{"title":"CNC Cylinder Heads","description":"","products":[{"product_id":"4p-outlaw-r35-gtr-cnc-head","title":"4P Outlaw R35 GTR CNC Head","description":"\u003cp\u003eThe highly anticipated 4P Outlaw R35 GTR CNC cylinder head is here!  You can expect world class quality and the best performance from our GTR offering that is in line with the outstanding products we have for other platforms.  On a high output car, expect over 100hp gain and improved high RPM performance and reliability.\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOEM valve guides or optional bronze valve guides\u003c\/li\u003e\n\u003cli\u003eValve job specific to your type of street driving or racing\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003cli\u003eOptional valvetrain packages are in the checkbox area\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRoad Race, Time Attack, Auto X\u003c\/li\u003e\n\u003cli\u003eDrag Race\u003c\/li\u003e\n\u003cli\u003eStreet use and daily driving\u003c\/li\u003e\n\u003cli\u003eGasoline, E85, Ethanol, Methanol\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e340+ CFM airflow, a massive improvement over stock and superior flow when compared to other offerings on the market\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability\u003c\/li\u003e\n\u003cli\u003eHigh velocity intake port design\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design that outflows other heads. Boost response that will SET YOU BACK!!\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003cli\u003eOptional Super Alloy valves are a hybrid incoloy that are 5 times the tensile strength of an inconel valve, less weight, and have better heat management properties. These valves have memory to return to their original shape as they cool.\u003c\/li\u003e\n\u003cli\u003eOptional PAC Enhanced valve springs are made in the USA and have gone through anti-fatigue processes for longer life and better valve control than the competition.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e*If you are sending your heads in for porting, please send your buckets and camshafts so that we can set lash.  If you don't have camshafts chosen, we can supply those as well*\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":32595500957833,"sku":"4P-Outlaw-R35GTR","price":4260.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/outlawr35gtr1.jpg?v=1583425178"},{"product_id":"4p-peacemaker-cnc-head","title":"4P Peacemaker CNC Head","description":"\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eManganese Bronze Valve Guides (16)\u003c\/li\u003e\n\u003cli\u003eOversized Intake Seats (8)\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003cli\u003e4P 38.3mm Intake Valves (8) \u003c\/li\u003e\n\u003cli\u003e4P Custom Exhaust Valves (8)\u003cbr\u003e\u003cb\u003eWorld Record NITRO All Motor....yep\u003c\/b\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e2.7L and larger serious DRAG RACE ONLY\u003c\/li\u003e\n\u003cli\u003eIf you have smaller than a 2.7L engine, go see the Super 99\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOVER 425 CFM! 15-25 hp over the competition's best\u003c\/li\u003e\n\u003cli\u003eExclusive 4P custom 38.3mm Intake Valve that is lighter than the competition's smaller valves\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design and 4P proprietary valve produces 7-9hp over the competition\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability.\u003c\/li\u003e\n\u003cli\u003eOur intake port has very little turbulence and great velocity when compared to our competitors. You can hear the difference on the bench!\u003c\/li\u003e\n\u003cli\u003e5 years in testing and development with PROVEN back to back results.\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34442411737225,"sku":"4P-PCMKR","price":2250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/peacemaker2.jpg?v=1602736370"},{"product_id":"pro-163","title":"4P Pro 163 CNC Head","description":"\u003cp\u003e\u003cb\u003eNote: Fits PRB Type S K20A2 head, RBC Civic Si Cylinder head, RSP Cylinder head, and PPA and PPL K24A1 CRV heads. Does not fit in RBB TSX castings.\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOEM Guides left in for porting \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eOversized Intake Seats (8) \u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff6600;\"\u003eValves Included!!\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAll Motor Street \u003c\/li\u003e\n\u003cli\u003eUSAC Midget\u003c\/li\u003e\n\u003cli\u003eHigh HP open class Road Race\u003c\/li\u003e\n\u003cli\u003e2.4L+ Displacement Naturally Aspirated Engines \u003c\/li\u003e\n\u003cli\u003eE85, Methanol, Gasoline\u003c\/li\u003e\n\u003cli\u003eNot recommended for high boost applications, but some turbo cars run them with HUGE success.\u003c\/li\u003e\n\u003cli\u003eIf you are competitively racing and you are running one of our competitor's heads, make the switch and let the results do the talking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eV2 Pro 163 Started 11\/10\/2018 and is 400 CFM and a new intake design.  All heads prior to that are V1.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eUtilizes a 4 Piston 50 degree 37mm valve which flows better and weighs 7 grams less per valve than other 37s on the market.\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability.\u003c\/li\u003e\n\u003cli\u003eOur intake port has very little turbulence and great velocity when compared to our competitors. You can hear the difference on the bench!\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471316029577,"sku":"Pro-163-INC++++37IN(F6980)-30EX(F6071)-Valve++++","price":1850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/Pro156v2.2020.2_b19480d5-b2d5-412a-888e-812f0571716e.jpg?v=1706636972"},{"product_id":"4p-s99","title":"4P Peacemaker Jr. *NEW*","description":"\u003cp\u003eThe 4P Peacemaker Jr. CNC Cylinder Head has been a dominant force in All Motor for years, having never lost an HDAY All Motor win since 2018 and never giving up the record.  If you are running something else, you are simply playing for second behind every racer that runs this.  Plain and simple you are going home round 1.  Our competition buys these and removes our logo or blurs them in their videos.\u003c\/p\u003e\n\u003cp\u003eThis head has an evolution over the years, so make sure you get the latest and greatest rendition from 4P.\u003c\/p\u003e\n\u003cp\u003eOfficial ALL MOTOR World Record Holder\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eManganese Bronze Valve Guides (16)\u003c\/li\u003e\n\u003cli\u003eOversized Intake Seats (8)\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003cli\u003e4P 37mm Intake Valves (8) \u003c\/li\u003e\n\u003cli\u003e4P Custom Exhaust Valves (8)\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eCopper seats are only recommended for those using Titanium valves.  Otherwise they are not needed.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for 2.5L to 2.7L drag race engines, serious max effort DRAG RACE ONLY!  Over 440whp Capable on stock stroke!\u003c\/li\u003e\n\u003cli\u003eThe benchmark All Motor Race Head that everyone tries to copy!\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMANY cars have run 9.2 and 149 mph on M1 with this head...not 1....MANY\u003c\/li\u003e\n\u003cli\u003eETs and race wins backed up by our many customers regardless of chassis or tuner.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e13 HDAY All Motor Titles have been won by Super99\/PM Jr powered race cars.\u003c\/li\u003e\n\u003cli\u003eFits PRB, PPA, and PPL Cylinder Head Castings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e412+ CFM @ .650\" lift and 15hp over the competition's best\u003c\/li\u003e\n\u003cli\u003eExclusive 4P custom 37mm Intake Valve that is lighter than the competition's smaller valves, flows more air, and makes more power.\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design and 4P proprietary valve produces 7-9hp over the competition\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability.\u003c\/li\u003e\n\u003cli\u003eOur intake port has very little turbulence and proper velocity when compared to our competitors. You can hear the difference on the bench!\u003c\/li\u003e\n\u003cli\u003eYears in testing and development with PROVEN back to back results and records to show for it.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/strong\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471316095113,"sku":"4P-PMjr-Include-Intake(37mm)(F6980)\/Exhaust(30mm\/55)(F6071)-Valves","price":2250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/k20.1_1.jpg?v=1763661223"},{"product_id":"pro-156v2","title":"4P Pro 156v2 CNC Head","description":"\u003cp\u003eThe NEW Pro 156v2 CNC cylinder head is the ultimate cylinder head for your street car. The original Pro 156 raised the bar and set the standard for entry level street cylinder heads by offering the highest quality in the industry and airflow that surpassed many very expensive race heads. The newest version of this head takes it a step further with improved airflow throughout the entire lift range, top to bottom. We spent countless hours balancing airflow to make sure this port is the best on the market. This head offers 360 CFM on a stock size valve, giving you plenty of flexibility to run a wide range of VTC and simplifying installation for those that don't find themselves pulling the engine out of their car to degree cams and check clearances. You can install the head and enjoy the power.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNote: will not work with RBB TSX casting!  See 4P Pro TSX for RBB Heads.\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOEM Guides left in for porting \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff6600;\"\u003eNO VALVES\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAll Motor Street\/Race\u003c\/li\u003e\n\u003cli\u003eOutlaw Turbo\u003c\/li\u003e\n\u003cli\u003eTurbo Street\u003c\/li\u003e\n\u003cli\u003eRoad Race\u003c\/li\u003e\n\u003cli\u003eUSAC Midget\u003c\/li\u003e\n\u003cli\u003eSuitable for 2.0-2.4L Road Race engines with a broad powerband in mind\u003c\/li\u003e\n\u003cli\u003eSuitable for 2.4-2.7L Drag Race engines as an alternative to our large valve 163 heads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e360cfm airflow where popular camshafts lift, and huge low end and midrange flow.\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003e45 degree valve job designed for long life and durability.\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eOptional Full length bronze manganese valve guide for valve stability.\u003c\/li\u003e\n\u003cli\u003ePort walls are left extra thick for high boost applications.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471316127881,"sku":"Pro-156v2","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/pro156v2-3.jpg?v=1605486842"},{"product_id":"pro-tsx","title":"4P Pro TSX CNC Head","description":"\u003cp\u003eThis port was specifically designed for the smaller TSX port. It is a high flowing, small volume port with high air speed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOEM Guides left in for porting \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAll Motor Street and Race Engines\u003c\/li\u003e\n\u003cli\u003ePerfect for stock to basic 2.0L engines\u003c\/li\u003e\n\u003cli\u003ePerfect for 2.0L Road Race where midrange punch must be retained\u003c\/li\u003e\n\u003cli\u003eTurbo and Supercharged\u003c\/li\u003e\n\u003cli\u003eSuitable for all out 2.0-2.4L Road Race engines with high hp in mind and low end, off corner acceleration\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eThis is our preferred cylinder head for SFWD and AWD Turbo cars exceeding 1000whp.  Also look at the Kingpin for extreme horsepower levels.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe RBB TSX heads have the smallest port and least material available for machining when compared to the other K-Series castings. This port was designed to fit in this casting, and takes a mediocre 275cfm cylinder head and transforms it into a 340+cfm race winner!\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003e45 degree valve job designed for long life and durability.\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eSmaller intake port volume, high air speed port design.\u003c\/li\u003e\n\u003cli\u003eOptional full length bronze manganese valve guide for valve stability.\u003c\/li\u003e\n\u003cli\u003ePort walls are left extra thick for high boost applications when used in other castings.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471316226185,"sku":"4P-PROTSX","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/tsx1_1.jpg?v=1700316205"},{"product_id":"4p-gsr","title":"4P Outlaw V2 GSR CNC Head","description":"\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eOutlaw V2 - More CFM, More Horsepower\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e4P CNC heads make significantly more power, AND last up to 3 times longer than the competition. That is what our cylinder head program is all about...pumping out the biggest horsepower, keeping it responsive, and doing so with increased longevity. With a high power turbo car, your biggest battle is dealing with extreme exhaust temperatures. Our heads have design features that pull heat away from the valve and improve reliability on the street and race track.\u003c\/p\u003e\n\u003cp\u003e4P Cylinder Heads hold more world records than all others combined.  SFWD World Record at 1400hp, Outlaw FWD World Record at 2000hp, AWD World Record, Outlaw AWD World Record.\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOEM or Bronze valve guides available\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOutlaw Turbo, Hot Rod\u003c\/li\u003e\n\u003cli\u003eStreet and Outlaw All Motor\u003c\/li\u003e\n\u003cli\u003eRoad Race\u003c\/li\u003e\n\u003cli\u003eE85, Methanol, Gasoline\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability\u003c\/li\u003e\n\u003cli\u003eHigh velocity intake port design\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eEasy to own port design that moves air fast!\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003cli\u003e300+CFM on stock size valve\u003c\/li\u003e\n\u003cli\u003e320 CFM on +1mm valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471316258953,"sku":"4P-GSR","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/img_8766.jpg?v=1605486279"},{"product_id":"4p-b16","title":"4P Outlaw V2 B16 CNC Head","description":"\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eOutlaw V2 - More CFM, More horsepower\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e4P CNC heads make significantly more power, AND last up to 3 times longer than the competition. That is what our cylinder head program is all about...pumping out the biggest horsepower, keeping it responsive, and doing so with increased longevity. With a high power turbo car, your biggest battle is dealing with extreme exhaust temperatures. Our heads have design features that pull heat away from the valve and improve reliability on the street and race track.\u003c\/p\u003e\n\u003cp\u003e4P Cylinder Heads hold more world records than all others combined.  SFWD World Record at 1400hp, Outlaw FWD World Record at 2000hp, AWD World Record, Outlaw AWD World Record.\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOEM or Bronze valve guides available\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOutlaw Turbo, SFWD, True Street\u003c\/li\u003e\n\u003cli\u003eStreet and Outlaw All Motor\u003c\/li\u003e\n\u003cli\u003eRoad Race\u003c\/li\u003e\n\u003cli\u003eE85, Methanol, Gasoline\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability\u003c\/li\u003e\n\u003cli\u003eHigh velocity intake port design\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eEasy to own port design that moves air fast!\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003cli\u003e300+ CFM on stock size valve\u003c\/li\u003e\n\u003cli\u003e315 CFM on +1mm valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471316324489,"sku":"4P-B16","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/outlawb163.jpg?v=1605485888"},{"product_id":"pro-h22","title":"4P Pro H22 CNC Head","description":"The CNC Ported Pro H22 cylinder head is perfect for your street\/race all motor car or your high power turbo car.  If you are building a large displacement maximum effort all motor drag race car, you should consider the Outlaw 370 H22 Head.\n\nThe world's fastest and most powerful H22 is powered by a 4P Pro H22 CNC Cylinder Head.  35 or 36mm valve is available for this head on the stock intake seat, at the same price.  This head flows up to 360 CFM in that configuration.\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOEM or optional Bronze valve guides\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAll Motor Street\/Race\u003c\/li\u003e\n\u003cli\u003eOutlaw Turbo\u003c\/li\u003e\n\u003cli\u003eTurbo Street\u003c\/li\u003e\n\u003cli\u003eRoad Race\u003c\/li\u003e\n\u003cli\u003eSuitable for 2.0-2.4L Road Race engines with a broad powerband in mind\u003c\/li\u003e\n\u003cli\u003eSuitable for 2.4-2.7L Drag Race engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003e45 degree valve job designed for long life and durability.\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design with up to 25cfm over our competition.\u003c\/li\u003e\n\u003cli\u003eIntake port features a laid out short turn for superior air speed around the valve when compared to conventional tall short turn port designs.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese valve guide for valve stability.\u003c\/li\u003e\n\u003cli\u003ePort walls are left extra thick for high boost applications.\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471316357257,"sku":"Pro-H22","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/proh22intake.jpg?v=1700323449"},{"product_id":"pro-s2k","title":"4P Pro S2K CNC Head","description":"\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOEM Guides left in for porting \u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff6600;\"\u003eNO VALVES\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePro All Motor, All Motor Street\u003c\/li\u003e\n\u003cli\u003eHigh horsepower turbo and supercharged applications 500-1500+hp\u003c\/li\u003e\n\u003cli\u003eUSAC Midget\u003c\/li\u003e\n\u003cli\u003eHigh horsepower open class Road Race\u003c\/li\u003e\n\u003cli\u003eIf you are competitively racing and you are running one of our competitor's heads, make the switch and let the results do the talking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eCustom intake valve that dramatically outperforms other off-the-shelf valves and weights up to 6 grams less per valve.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability.\u003c\/li\u003e\n\u003cli\u003eOur intake port has very little turbulence and great velocity when compared to our competitors. You can hear the difference on the bench!\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design up to 40cfm better than the competition.\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471316390025,"sku":"Pro-S2K","price":1450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/s2000_1.jpg?v=1637355529"},{"product_id":"4p-evo789","title":"4P Outlaw EVO CNC Head","description":"\u003ch2\u003eCongrats to Procco for taking the 7 second EVO bounty on the 4P Outlaw EVO cylinder head, and all 7 second EVOs that have now reached that milestone using the 4P Outlaw EVO CNC Cylinder Head\u003c\/h2\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOriginal Guides left in for porting\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRoad Race, Time Attack, Auto X\u003c\/li\u003e\n\u003cli\u003eDrag Race\u003c\/li\u003e\n\u003cli\u003eStreet use and daily driving\u003c\/li\u003e\n\u003cli\u003eGasoline, E85, Ethanol, Methanol\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePorts from 280 to 300+ CFM depending on your application\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability\u003c\/li\u003e\n\u003cli\u003eHigh velocity intake port design\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003cli\u003eSuper Alloy valves are a hybrid incoloy that are 5 times the tensile strength of an inconel valve, less weight, and have better heat management properties. These valves have memory to return to their original shape as they cool.\u003c\/li\u003e\n\u003cli\u003ePAC Enhanced valve springs are made in the USA and have gone through anti-fatigue processes for longer life and better valve control than the competition.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cb\u003eAll heads require a core! Right now we are unable to effectively source good used cores, and we cannot get new cores from Mitsubishi.  You have to send your head in for porting.  Sorry for the inconvenience.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471316422793,"sku":"4P-EVO789","price":1650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/evo-1.jpg?v=1668796688"},{"product_id":"moab-gsr","title":"MOAB GSR CNC Head","description":"\u003cp\u003eThe new MOAB GSR is the ultimate B-Series racing CNC cylinder head.  It moves 320 cfm through a 34mm intake valve and flow is improved through the entire lift range from top to bottom.  This head is ideal for large all motor engines looking to make maximum power and for high horsepower turbo cars wanting to push beyond what our world record holding Outlaw ports have achieved.  \u003c\/p\u003e\n\u003cp\u003e4P CNC heads make significantly more power, AND last up to 3 times longer than the competition. That is what our cylinder head program is all about...pumping out the biggest horsepower, keeping it responsive, and doing so with increased longevity. With a high power turbo car, your biggest battle is dealing with extreme exhaust temperatures. Our heads have design features that pull heat away from the valve and improve reliability on the street and race track.\u003c\/p\u003e\n\u003cp\u003e4P Cylinder Heads hold more world records than all others combined.\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOversized intake seats for a +1mm intake valve\u003c\/li\u003e\n\u003cli\u003eOEM or Bronze guides available\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOutlaw Turbo, True Street, SFWD\u003c\/li\u003e\n\u003cli\u003eStreet and Race All Motor\u003c\/li\u003e\n\u003cli\u003eRoad Race\u003c\/li\u003e\n\u003cli\u003eE85, Methanol, Gasoline\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e320 CFM and Huge flow through the entire lift range.\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability (optional)\u003c\/li\u003e\n\u003cli\u003eHigh velocity intake port design\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471321763977,"sku":"moab-gsr","price":1550.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/moabgsr1.jpg?v=1605510240"},{"product_id":"outlaw370-h22","title":"4P Outlaw 370 H22 CNC Head","description":"\u003cp\u003eThe Outlaw 370 H22 is the newest addition to the 4P H-Series lineup.  We have taken design attributes from our world record setting K-Series program and applied those to the H22 head in order to create the meanest H head on the market for maximum All Motor horsepower.  This head features a +2mm intake valve that moves over 370cfm.  Beyond the flowbench, it features a custom intake and exhaust valve design  and uses the same throat and airspeed formula that has set multiple records over multiple racing series.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOversized intake seats for a +2mm intake valve\u003c\/li\u003e\n\u003cli\u003eOEM valve guides or optional bronze valve guides.\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003cli\u003eThis head requires custom intake valves.  You can source them yourself or we can provide them.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAll Motor Race\u003c\/li\u003e\n\u003cli\u003eSuitable for 2.0-2.4L Road Race engines with a high rpm powerband in mind\u003c\/li\u003e\n\u003cli\u003eSuitable for 2.3-2.7L Drag Race engines looking to produce maximum power.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eOthers talk about big flow, but we have tested ALL others on the market.  They fall WELL short of our 370cfm flow on our flow bench in equal conditions, regardless of what they advertise.\u003c\/li\u003e\n\u003cli\u003e50 degree valve job for increased on-track performance\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design with up to 25cfm over our competition.\u003c\/li\u003e\n\u003cli\u003eIntake port features a laid out short turn for superior air speed around the valve when compared to conventional tall short turn port designs.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese valve guide for valve stability.\u003c\/li\u003e\n\u003cli\u003e\u003cb\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471321796745,"sku":"Outlaw370-H22","price":1450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/proh221.jpg?v=1605485271"},{"product_id":"outlaw-evox","title":"4P Outlaw EVO X CNC Head","description":"\u003cp\u003eThe highly anticipated 4P Outlaw EVO X CNC cylinder head is here!  This is THE best cylinder head on the market for your EVO X with regards to performance and machining quality. We have put countless hours of development and tested against all others on the market to bring you the best performing cylinder head whether you are endurance racing or drag racing.  We build these heads to compliment your engine, whether that be a 2.3L small turbo broad powerband car, or a 2.0L high rpm drag race car.\u003c\/p\u003e\n\u003cp\u003e4P EVO X heads power THE fastest cars in the world.\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOEM valve guides or optional bronze valve guides\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRoad Race, Time Attack, Auto X\u003c\/li\u003e\n\u003cli\u003eDrag Race\u003c\/li\u003e\n\u003cli\u003eStreet use and daily driving\u003c\/li\u003e\n\u003cli\u003eGasoline, E85, Ethanol, Methanol\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e350+ CFM airflow, more than 60 CFM improvement\u003c\/li\u003e\n\u003cli\u003e20+ CFM over the competition lifting the valve with popular camshaft grinds and 30+cfm over the competition for race cam applications.\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability\u003c\/li\u003e\n\u003cli\u003eHigh velocity intake port design\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design that outflows other heads...even those with larger valves!  Boost response on gear changes that will SET YOU BACK!!\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003cli\u003eOptional Super Alloy valves are a hybrid incoloy that are 5 times the tensile strength of an Inconel valve, less weight, and have better heat management properties. These valves have memory to return to their original shape as they cool.\u003c\/li\u003e\n\u003cli\u003eOptional PAC Enhanced valve springs are made in the USA and have gone through anti-fatigue processes for longer life and better valve control than the competition.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cb\u003eAll heads require a core! Right now we are unable to effectively source good used cores, and we cannot get new cores from Mitsubishi.  You have to send your head in for porting.  Sorry for the inconvenience.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e*If you are sending your head in for porting, please send your buckets and camshafts so that we can set lash*\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471321829513,"sku":"outlaw-evox","price":1650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/sam_4234.jpg?v=1668796669"},{"product_id":"4p-outlawd16","title":"4P Outlaw D16 CNC Head","description":"\u003cp\u003eThe 4P Outlaw D16 CNC cylinder head brings a new level of quality and performance to Honda D16 engine enthusiasts and racers.  This is a highly developed port design that excels where others fall short.  The 4P D16 head not only carries huge CFM gains at high lift, it also carries big flow gains in low lift areas.  This is critical for many D16 owners that are running smaller lift camshafts.  Other heads that were tested showed 25-30 cfm gains at .500 lift, but they lost significant flow below .350.  The 4P head doubles their CFM gains up top and shows big gains in flow at ALL lift points bottom to top.\u003c\/p\u003e\n\u003cp\u003e4P sets the cylinder head up for your application whether it is all motor or forced induction.  Our cylinder head program is all about pumping out the biggest horsepower, keeping it responsive, and doing so with increased longevity.\u003c\/p\u003e\n\u003cp\u003e4P Cylinder Heads hold more world records than all others combined.\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOEM or Bronze valve guides available\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStreet and SFWD\/Outlaw Turbo Race\u003c\/li\u003e\n\u003cli\u003eStreet and Outlaw All Motor\u003c\/li\u003e\n\u003cli\u003eRoad Race\u003c\/li\u003e\n\u003cli\u003eE85, Methanol, Gasoline\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff0000;\"\u003eD16Z6 and D16Y8 available\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eFull length bronze manganese guide for valve stability\u003c\/li\u003e\n\u003cli\u003eHigh velocity intake port design\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003cli\u003e260+ CFM on stock size valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471323140233,"sku":"4P-OutlawD16","price":1250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/d16z6-4.jpg?v=1605485616"},{"product_id":"4pk20chead1","title":"4P K20C1 Type R Cylinder Head Performance Rebuild","description":"\u003cp\u003eMatching the proper cylinder head and induction to your application is critical in the K20C1 turbo engine program. This is a very responsive engine at low rpm, and Honda carries this power up towards 7000 rpm. If you are wanting to keep these stock-like characteristics, but improve the high rpm durability and control valve float, then the STAGE 1 4 Piston Cylinder Head is for you. The ports are left untouched as to not affect the fuel economy and stock mannerisms of the DI tumble port. It does include cleaning of your cylinder head, a Newen CNC single point performance valve job, and resurface.\u003c\/p\u003e\n\u003cp\u003eInstall Ferrea Competition Plus Valves and a Ferrea Valve Spring Kit for added durability at high rpm, and the ability to handle much more exhaust temperature than the stock valve. OEM Valvetrain failures have been documented with continued use at high rpm in endurance racing applications or during missed shifts.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eThis is a Stock Head Rebuild with NO PORTING\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471323959433,"sku":"4PK20Chead1","price":650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/k20c1.11_1_a612d01a-3c9d-4242-8b03-6576192e9b43.jpg?v=1605484857"},{"product_id":"4pk20chead2","title":"4P K20C1 Type R CNC Race Cylinder Head","description":"\u003cp\u003eMatching the proper cylinder head and induction to your application is critical in the K20C1 turbo engine program. This is a very responsive engine at low rpm, and Honda carries this power up towards 7000 rpm. The 4 Piston Racing CNC Ported Cylinder Head is for the enthusiast that is looking to improve efficiency and power delivery over the factory Honda engine. This head has proven to improve spool of the stock turbo, allowing it to come in even earlier than the stock tumble port! This cylinder head will allow the same power to be made at less boost pressure and more power to be made once your system is maximized. Peak output is still limited by the OEM fuel system and turbo if you are still using them, and IF you max those both out. This cylinder head improves performance, and really gives you a solid platform to move into a larger turbo and more RPM in the future.  CFM output is Nearly Doubled.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe exhaust port is modified to increase flow and lower backpressure when used with a larger turbo, however it is not ported in areas that are prone to cracking with high exhaust heat.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOverall streetability and fuel economy is maintained with this head. We have removed the tumble port design in favor of a more conventional 4 valve performance cylinder head orientation, but the overall dimensions and port volume has been kept the same as to maintain the broad RPM range performance of the mighty K20C1 engine.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJet Wash and Soda Blast\u003c\/li\u003e\n\u003cli\u003eCrack check and inspection\u003c\/li\u003e\n\u003cli\u003eCNC Porting of Intake and Exhaust ports (CFM is drastically improved!!)\u003c\/li\u003e\n\u003cli\u003eNewen CNC single point performance valve job\u003c\/li\u003e\n\u003cli\u003eSurface\u003c\/li\u003e\n\u003cli\u003eAssembly\u003c\/li\u003e\n\u003cli\u003eThis pricing is based on you sending your head in for porting and service. If you would like to purchase a new OEM Honda Cylinder Head Assembly for us to port, then select that option below.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInstall Ferrea Competition Plus Valves and a Ferrea Valve Spring Kit for added durability at high rpm, and the ability to handle much more exhaust temperature than the stock valve. OEM Valvetrain failures have been documented with continued use at high rpm in endurance racing applications or during missed shifts.\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471324057737,"sku":"4PK20Chead2","price":1450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/k20c1.11_1.jpg?v=1605484487"},{"product_id":"4p-billetk","title":"4P BILLET CNC Race Head","description":"\u003cp\u003eUpdate 11\/9\/21\u003cbr\u003e\u003cbr\u003eThe 4P Billet CNC Race Head is the ultimate for those wanting to push the limits of cylinder pressure and horsepower levels.  If you are wanting to push power approaching or exceeding 2000hp, this is something you need to consider for its strength and rigidity.\u003c\/p\u003e\n\u003cp\u003eWe offer this head DRY and with water passages.  Please consider that you may want to run this completely dry in an alcohol engine at power levels listed above or with very high levels of nitromethane.  Our preference is a wet block with this head dry.  It is easy to tune and the wet block will help you to manage piston growth with heat.  Some guys choose to run both completely dry.\u003c\/p\u003e\n\u003cp\u003eOur machining is absolute art, and these are proven pieces that have raced many times. \u003c\/p\u003e\n\u003ch2\u003eIncludes\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eManganese Bronze Valve Guides (16)\u003c\/li\u003e\n\u003cli\u003eNickel Aluminum Bronze Intake Seats (8)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eA3 Copper Beryllium Exhaust Seats\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003cli\u003e4P Super Alloy Intake Valves\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e4P Super Alloy Exhaust Valves\u003c\/li\u003e\n\u003cli\u003eThis head with no water weighs 7 lbs MORE than an OEM head.  It is solid billet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDrag Race Turbo 1500-2500hp\u003c\/li\u003e\n\u003cli\u003eDrag Race Nitromethane\u003c\/li\u003e\n\u003cli\u003eDrag Race All Motor (this works for M1 cars as well)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003eThere are not provisions for VTEC.  This is a pure race cylinder head for pure race cars.  They are made to order and lead time is 6 weeks.  Sometimes they are in stock, please inquire.\u003c\/p\u003e\n\u003ch2\u003e\u003c\/h2\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471358333065,"sku":"4P-BilletK","price":6400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/141a1755.jpg?v=1605479231"},{"product_id":"4p-pro-r40-k24z-cnc-cylinder-head","title":"4P Pro R40 K24Z CNC Cylinder Head","description":"\u003cp\u003eThe NEW Pro R40 CNC cylinder head is the ultimate cylinder head for your K24Z powered street or race car.  This platform has long been neglected due to a lack of camshaft and valvetrain availability, and the single port exhaust design that has been touted as an Achilles heel when compared to traditional 4 port K20 cylinder heads.  It is true that this presents some challenges when building a maximum output high rpm platform, but it also presents some great opportunities.  The intake port from the factory stock R40 is actually the best flowing K-Series port that Honda has produced to date, and we drastically improve on that.  The exhaust may appear to be a challenge, but it can be exploited as a great opportunity for many users.  This head design makes turbo packaging much easier, and reasonably sized turbos in the 500-850whp range respond and spool very fast.  This R40 cylinder head arrangement is also preferred in some RWD applications for its superior packaging.  You may be a person that doesn't want to tackle the challenges of swapping to a 4 port head, and this CNC Cylinder head lays the ground work for you to make more power than you can ever use effectively.\u003c\/p\u003e\n\u003cp\u003eWe take the R40 Cylinder Head casting and CNC port the intake ports and critical bottleneck areas of the exhaust port.  This includes the bowls and short turns, and a major rework of the exhaust outlet.  Areas of the port that are close to water jackets are left alone to prevent cracking with high exhaust temperatures and big boost loads.  Once the head is CNC ported, we finish it off with a fresh surface and our Newen single point CNC valve job.  We also offer our own PAC valve spring setup that is far superior in valve control and longevity than preexisting offerings.  4P Camshafts are in production, with delivery expected late 2021.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSend your R40 head casting for us to port, or purchase our cores outright without having to send one in.\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOEM Guides left in for porting or OPTIONAL Bronze valve guides\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff6600;\"\u003eNO VALVES\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAll Motor Street\/Race\u003c\/li\u003e\n\u003cli\u003eTurbo Street\u003c\/li\u003e\n\u003cli\u003eRoad Race and Time Attack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e370cfm airflow where popular camshafts lift, and huge low end and midrange flow.\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis cnc porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003e45 degree valve job designed for long life and durability.\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eOptional Full length bronze manganese valve guide for valve stability.\u003c\/li\u003e\n\u003cli\u003ePort walls are left extra thick for high boost applications.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eSee our 340hp R40 head and cam test below, all motor, pump gas.  We changed induction and made 356 the next day!\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003ciframe src=\"https:\/\/www.facebook.com\/plugins\/video.php?height=314\u0026amp;href=https%3A%2F%2Fwww.facebook.com%2F4Piston%2Fvideos%2F478304343950924%2F\u0026amp;show_text=false\u0026amp;width=560\u0026amp;t=0\" width=\"560\" height=\"314\" style=\"border: none; overflow: hidden;\" scrolling=\"no\" frameborder=\"0\" allowfullscreen=\"true\" allow=\"autoplay; clipboard-write; encrypted-media; picture-in-picture; web-share\"\u003e\u003c\/iframe\u003e\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34611770556553,"sku":"Pro-R40","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/ProR40.4.jpg?v=1764857275"},{"product_id":"4p-reaper-cnc-cylinder-head","title":"4P REAPER CNC Cylinder Head","description":"\u003ch2\u003eIntroducing the \u003cspan style=\"color: #f90707;\"\u003e4P REAPER\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eMonths of development has lead to this.  In 2018 we worked tirelessly on developing a superior port for our Billet K20 cylinder head.  It is a clean slate design that could not fit into any OEM cylinder head casting, and one that outflowed anything on the market by a landslide.  Unfortunately after complaints from our competitors, our Billet head was banned from competition.  We immediately put that energy into developing a race port that has changed All Motor forever.  Even our competition runs it, copies it, benchmarks from it.  Our warpath has not only won every All Motor race competition since, but has held every record in the class since....the rampage has been so fierce that the competition all but quit.\u003cbr\u003e\u003cbr\u003e4P Race Castings allow us to put much of our billet head design into a more affordable casting that is superior in every way, and allows cooling that is suitable for the street and endurance racing.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh flow intake port that outperforms top to bottom 440+ CFM.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh flow exhaust port.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBalanced combustion chamber developed after hundreds of dyno pulls on various engine combinations.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eNew Oversized valve seats available in steel and copper beryllium.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBronze valve guides standard.\u003c\/li\u003e\n\u003cli\u003eNewen CNC Valve Job developed specifically for this head.\u003c\/li\u003e\n\u003cli\u003eRBC Style heads are shipping now, PRB Style heads ship February 2022.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCasting Design Features\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eAs OEM castings have gone out of production, those in the field have aged and worn, and the demands on our race engines have increased, we needed to develop a superior alternative to OEM.  The 4P Race Casting is superior in every way.\u003cstrong\u003e \u003cspan style=\"color: #fa0707;\"\u003eExclusively available at 4P.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade IN THE USA from A356-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003eThese \"porting castings\" give us a clean slate to put any port size and shape we choose, and offer a \"full cleanup\"\u003c\/li\u003e\n\u003cli\u003eWe machine a wide variety of combustion chamber shapes and sizes to suit your application.\u003c\/li\u003e\n\u003cli\u003ePort wall thickness is increased over OEM dramatically to allow us to run larger ports and move them around for high rpm applications.  Increased port wall thickness also allows for extreme boost applications.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExtra thick deck for increased rigidity and high boost handling capabilities.\u003c\/li\u003e\n\u003cli\u003eSuperior cooling through 3D printed water jackets\u003c\/li\u003e\n\u003cli\u003eAll heads accept VTEC and non-VTEC arrangement with OEM or aftermarket components.\u003c\/li\u003e\n\u003cli\u003eThese race ported heads are 100% designed, machined, and finished in house at 4 Piston Racing.  We will build you the head you need for your race or street program.\u003c\/li\u003e\n\u003cli\u003eHeads available in PRB and RSP\/RBC Style water jacket arrangements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eR40 K24Z heads available in 4 Port Exhaust Configurations to fit ANY of our Port Designs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch2\u003e\u003c\/h2\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":39668158201993,"sku":"4P-REAPER","price":3100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/Reaper1cut.jpg?v=1668797935"},{"product_id":"endyn-sprint-s2000-cylinder-head","title":"Endyn Sprint S2000 Cylinder Head","description":"\u003ch2\u003eEndyn (F20C-F22C) Sprint Cylinder Head\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"color: #fa0707;\"\u003e\u003cstrong\u003eExclusively available at 4 Piston\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard ports are higher velocity than OE's while flowing substantially more air to aid both mid-range torque production and high RPM 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been proven on race cars running over 100psi of boost that were splitting heads in half nearly every pass.  These simply will not suffer the same fate.  That thicker deck and casting provides superior head gasket sealing and improves power by keeping things rigid and from moving around.  These castings are made in the USA using premium materials, then we put them through a special process that removes porosity to make these solid like a piece of billet.  While your competition is running stock ports to try to hold them together, step up to the 4P Kingpin and give your race program a serious power and reliability advantage.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eThe 10 fastest AWD cars in the world run 4P Race Castings, B \u0026amp; K\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eWorld's Fastest 4 Cylinder \"No War\" 5.86@244 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chambers are left alone so that you can port them to your application.  Spark plug tubes are included when you purchase.  All oiling holes and coolant passages are machined for you as well.\u003c\/p\u003e\n\u003ch2\u003eCasting Design Features\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eAs OEM castings have gone out of production, those in the field have aged and worn, and the demands on our race engines have increased, we needed to develop a superior alternative to OEM.  The 4P Race Casting is superior in every way.\u003cstrong\u003e \u003cspan style=\"color: #fa0707;\"\u003eExclusively available at 4P.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade IN THE USA from A356-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003eThese \"porting castings\" give us a clean slate to put any port size and shape we choose, and offer a \"full cleanup\"\u003c\/li\u003e\n\u003cli\u003eWe machine a wide variety of combustion chamber shapes and sizes to suit your application.\u003c\/li\u003e\n\u003cli\u003ePort wall thickness is increased over OEM dramatically to allow us to run larger ports and move them around for high rpm applications.  Increased port wall thickness also allows for extreme boost applications.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExtra thick deck for increased rigidity and high boost handling capabilities.\u003c\/li\u003e\n\u003cli\u003eSuperior cooling through 3D printed water jackets\u003c\/li\u003e\n\u003cli\u003eAll heads accept VTEC and non-VTEC arrangement with OEM or aftermarket components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch2\u003e\u003c\/h2\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":41037507952777,"sku":"4P-Race-Bare","price":2100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/4P.PRB.Race12_f61640a8-5d24-4626-9539-2bd60394c417.jpg?v=1672171334"},{"product_id":"4p-outlaw-ls-cnc-head","title":"4P Outlaw LS Non-VTEC CNC Cylinder Head","description":"\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eAvailable NOW!\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt has been a long time coming.  After years of requests for us to develop a non-VTEC B18 LS cylinder head, we finally caved.  Our cylinder head development specialists spent countless hours using everything we have learned about 4 valve cylinder heads and our formula for our world record holding VTEC heads, and applied that expertise to this non-VTEC cylinder head.  The results are amazing, with increases in the flow range of over 60 CFM through the range on both the intake and exhaust ports on a stock sized valve!\u003c\/p\u003e\n\u003cp\u003eThis head is excellent for both all motor and turbocharged applications.\u003c\/p\u003e\n\u003cp\u003e4P Cylinder Heads hold more world records than all others combined.  SFWD World Record at over 1500hp, Outlaw FWD World Record at 2000hp, and ALL 7 second SFWD passes have been made on 4P CNC Cylinder Heads.\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eOEM or Bronze valve guides available\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAll Motor Street and Race\u003c\/li\u003e\n\u003cli\u003eHigh Horsepower Turbo\u003c\/li\u003e\n\u003cli\u003eRoad Race\u003c\/li\u003e\n\u003cli\u003eGasoline, E85, Methanol\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSlow-cut precision 5-axis CNC porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003eHigh velocity intake port design\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eProperly sized ports for responsive engines that accelerate your car faster than the competition.\u003c\/li\u003e\n\u003cli\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/li\u003e\n\u003cli\u003e280+CFM on stock size valve\u003c\/li\u003e\n\u003cli\u003e300+ CFM on +1mm valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":41215596527753,"sku":"4P-CNC-LS","price":1350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/B18B.10.jpg?v=1682271402"},{"product_id":"4p-f20c-s2000-bare-race-casting","title":"4P F20C S2000 BARE RACE CASTING","description":"\u003ch4\u003e\n\u003cstrong\u003e\u003cspan style=\"color: #f90707;\"\u003eIN STOCK SHIPS NOW\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cp\u003eNow you can purchase our Race Castings bare and ready for you to machine yourself.  We have been asked by engine builders worldwide for us to supply them with our superior Race Castings so that they could further develop their own engine programs.  Now you can purchase them here and receive bulk discounts right on our website.  The cylinder heads come as shown in the photos with all mating faces machined, seat bores and spring seat pads machined, guide bores machined, but the ports and chambers are left alone so that you can port them to your application.  Spark plug tubes are included when you purchase.  All oiling holes and coolant passages are machined for you as well.\u003c\/p\u003e\n\u003ch2\u003eCasting Design Features\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eAs OEM castings have gone out of production, those in the field have aged and worn, and the demands on our race engines have increased, we needed to develop a superior alternative to OEM.  The 4P Race Casting is superior in every way.\u003cstrong\u003e \u003cspan style=\"color: #fa0707;\"\u003eExclusively available at 4P.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade IN THE USA from A356-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003eThese \"porting castings\" give us a clean slate to put any port size and shape we choose, and offer a \"full cleanup\"\u003c\/li\u003e\n\u003cli\u003eWe machine a wide variety of combustion chamber shapes and sizes to suit your application.\u003c\/li\u003e\n\u003cli\u003ePort wall thickness is increased over OEM dramatically to allow us to run larger ports and move them around for high rpm applications.  Increased port wall thickness also allows for extreme boost applications.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExtra thick deck for increased rigidity and high boost handling capabilities.\u003c\/li\u003e\n\u003cli\u003eSuperior cooling through 3D printed water jackets\u003c\/li\u003e\n\u003cli\u003eAll heads accept VTEC and non-VTEC arrangement with OEM or aftermarket components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch2\u003e\u003c\/h2\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":41216530710665,"sku":"4P-F20Race-Bare","price":1900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/4P.PRB.Race12_3488be3c-6506-428f-9e75-c26f09748603.jpg?v=1680624114"},{"product_id":"4p-race-casting-cnc-cylinder-head","title":"4P RACE CASTING CNC Cylinder Head","description":"\u003ch2\u003eIntroducing the \u003cspan style=\"color: #f90707;\"\u003e4P Race Casting\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eMonths of development has lead to this.  In 2018 we worked tirelessly on developing a superior port for our Billet K20 cylinder head.  It is a clean slate design that could not fit into any OEM cylinder head casting, and one that outflowed anything on the market by a landslide.  Unfortunately after complaints from our competitors, our Billet head was banned from competition.  We immediately put that energy into developing a race port that has not lost a SINGLE race since that day.  Our warpath has not only won every All Motor race competition since, but has held every record in the class since....the rampage has been so fierce that the competition has all but quit.\u003cbr\u003e\u003cbr\u003eIn 2021, 4 Piston Racing, Endyn, and MAST Motorsports entered into a partnership for 4P to have exclusive rights to the race casting going forward. This partnership has allowed us to reinvigorate the work we did on the 4P Billet, and deliver the REAPER to you.  These cylinder heads are producing on the track, with competitors seeing 2-3mph gains over the previous record holding 4P Heads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose the 4P Port Design that you want, and put it into a casting that is superior to OEM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eCasting Design Features\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eAs OEM castings have gone out of production, those in the field have aged and worn, and the demands on our race engines have increased, we needed to develop a superior alternative to OEM.  The 4P Race Casting is superior in every way.\u003cstrong\u003e \u003cspan style=\"color: #fa0707;\"\u003eExclusively available at 4P.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade IN THE USA from A356-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003eThese \"porting castings\" give us a clean slate to put any port size and shape we choose, and offer a \"full cleanup\"\u003c\/li\u003e\n\u003cli\u003eWe machine a wide variety of combustion chamber shapes and sizes to suit your application.\u003c\/li\u003e\n\u003cli\u003ePort wall thickness is increased over OEM dramatically to allow us to run larger ports and move them around for high rpm applications.  Increased port wall thickness also allows for extreme boost applications.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExtra thick deck for increased rigidity and high boost handling capabilities.\u003c\/li\u003e\n\u003cli\u003eSuperior cooling through 3D printed water jackets\u003c\/li\u003e\n\u003cli\u003eAll heads accept VTEC and non-VTEC arrangement with OEM or aftermarket components.\u003c\/li\u003e\n\u003cli\u003eThese race ported heads are 100% designed, machined, and finished in house at 4 Piston Racing.  We will build you the head you need for your race or street program.\u003c\/li\u003e\n\u003cli\u003eHeads available in PRB and RSP\/RBC Style water jacket arrangements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eR40 K24Z heads available in 4 Port Exhaust Configurations to fit ANY of our Port Designs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch2\u003e\u003c\/h2\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":41574650675337,"sku":"4P-RaceCastingPorted","price":3100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/Reaper1cut_bf8bb862-33bf-4f6f-8531-31be8584f227.jpg?v=1700318675"},{"product_id":"4p-pro-2jz-cnc-head","title":"4P Pro 2JZ CNC Head","description":"\u003cp\u003eThe NEW 4P Pro 2JZ CNC cylinder head is the ultimate cylinder head for your 2JZ powered street or race car.  We spent countless hours balancing airflow to make sure this port is the best on the market.  It not only flows great CFM, but it also has the proper air speed throughout the port to get the fuel and air where it needs to be for efficient combustion.  The 4P four valve formula is proven across every platform we touch, and that is why to see our name topping world record efforts across all forms of motorsports.  The 2J market will be no different.  We didn't just put effort in on the flow bench, we put these on the race track long before their release to make sure they were perfected for your 2JZ engine.  Our method with stock sized valves will outperform others with oversized valves, and we will give you camshaft centerline advantages that will translate to quicker acceleration.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNote: Porting available for VVT-i and Non VVT-i Cylinder Heads\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cb\u003ePricing is with YOU sending YOUR cylinder head in for porting.  We may have cores available for purchase.  We will add those as an option as we obtain good heads.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCNC Ported intake and exhaust ports\u003cstrong\u003e \u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePrecision CNC valve job using the latest NEWEN Fixed Turning technology\u003c\/li\u003e\n\u003cli\u003eResurface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOptions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBronze Valve Guides\u003cstrong\u003e \u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eA3 Beryllium Exhaust Seats\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e+1mm Intake Seat for Oversized Valve\u003c\/li\u003e\n\u003cli\u003eLashing with your camshafts or GSC cams provided by us\u003c\/li\u003e\n\u003cli\u003eContact us for custom options not listed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStreet\u003c\/li\u003e\n\u003cli\u003eRoad Race and Endurance\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh HP Drag Race\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHigh CFM airflow where popular camshafts lift, and huge low end and midrange flow.\u003c\/li\u003e\n\u003cli\u003eSlow-cut precision 5-axis CNC porting, second to none on machining quality.\u003c\/li\u003e\n\u003cli\u003e45 degree valve job designed for long life and durability.\u003c\/li\u003e\n\u003cli\u003eUnique power producing exhaust port design.\u003c\/li\u003e\n\u003cli\u003eOptional Full length bronze manganese valve guide for valve stability.\u003c\/li\u003e\n\u003cli\u003ePort walls are left extra thick for high boost applications.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOur heads are all shipped with installation tips, a sheet of desired clearances for setting up your engine, and a flow chart from your head.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eAll heads require a core! You can send us your head, or purchase one from us at the current market price.\u003c\/b\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":42921076424841,"sku":"4P-PRO-2JZ","price":2025.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/602A9248.jpg?v=1724273395"},{"product_id":"4p-b-series-race-casting-cylinder-head-preorder","title":"4P B-Series RACE CASTING Cylinder Head *PREORDER*","description":"\u003cp\u003eThis is a \u003cstrong\u003enon-refundable deposit\u003c\/strong\u003e on the 4P B-Series Race Casting.  It is not refundable under any circumstance and is a low deposit because of this.  If you participate in the pre-order, you also are getting this cylinder head at a discounted price.  Once you place your deposit, you will get an email with instructions going forward and a discount code for your final purchase.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThis will reserve one of the 200 initial race castings for you and helps us to plan production while also guaranteeing that you get one of the first batch.  The heads are offered \"as cast\" (valve job, surfaced, billet cam caps, unported ready to run) or CNC Ported with our race port (valve job, surfaced, CNC ported, billet cam caps, ready to run).  Valves and Valve Springs are not included, but you can add them at the time of shipment when we reach out to you for delivery.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 0, 255);\"\u003e\u003cstrong\u003ePricing \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e1. As cast - $2900 (your deposit is credited to this and you'll owe $2600 once ready to ship)\u003cbr\u003e2. CNC Race Ported - $3500 (your deposit is credited to this and you'll owe $3200 once ready to ship)\u003c\/p\u003e\n\u003cp\u003eExpected Delivery is March 2025\u003c\/p\u003e\n\u003ch2\u003eIntroducing the \u003cspan style=\"color: #f90707;\"\u003e4P B-Series Race Casting\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eWe have been working on the engineering behind the B-Series Race Casting for years, even before our K-Series.  We have taken everything we learned with the massive success of the K-Series program and applied that to the 4P B-Series Race Casting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAs Cast Cylinder Head\u003cbr\u003e\u003c\/strong\u003eThe \"As Cast\" cylinder head comes with valve job, surface, and billet cam caps.  It boasts a 290 CFM port even without porting.  This is a massive increase over stock cylinder heads but without the expense of CNC porting.  It flows more than ported offerings from most companies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCNC Race Ported Cylinder Head\u003c\/strong\u003e\u003cbr\u003eFor a little extra money, you get our CNC ported version, which takes airflow over 320 CFM even with a stock sized valve.  We ran these heads on select cars at WCF and they had to adjust their tunes and add fuel over their existing world record holding 4P Outlaw CNC cylinder heads.  This port design isn't just high flow at high lift...these guys had to add 20+% fuel even at idle and low rpm.  It is a GAME CHANGER for making big power.\u003c\/p\u003e\n\u003ch2\u003eWhy is this casting better?\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eAs OEM castings have gone out of production, those in the field have aged and worn, and the demands on our race engines have increased, we needed to develop a superior alternative to OEM.  The 4P Race Casting is superior in every way.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade IN THE USA from A356-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003eBased on GSR B18C1 Architecture\u003c\/li\u003e\n\u003cli\u003eBillet cams caps with precision machining.  Tired of dealing with mismatched, missing, or worn cam caps?  These are so perfect, so smooth, and billet for extra strength and rigidity.\u003c\/li\u003e\n\u003cli\u003eExtra thick deck for increased rigidity, better gasket sealing, and high boost handling capabilities.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePort wall thickness is increased over OEM dramatically to allow us to run larger ports and move them around for high rpm applications.  Increased port wall thickness also allows for extreme boost applications.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAreas of the exhaust water jacket that crack in OEM cylinder heads with high EGTs are completely eliminated.  The head retains water and cooling, but we have moved it to different areas.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll heads accept VTEC and non-VTEC arrangement with OEM or aftermarket components.\u003c\/li\u003e\n\u003cli\u003eThese race ported heads are 100% designed, machined, and finished in house at 4 Piston Racing.  We will build you the head you need for your race or street program.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/7YsTFLcd3T0?si=3eO6L4YDgr18wmTO\" height=\"315\" width=\"560\" allowfullscreen=\"\" referrerpolicy=\"strict-origin-when-cross-origin\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":43114076635273,"sku":"4P-B-Racecast","price":300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/602A6335.jpg?v=1730839851"},{"product_id":"4p-b-series-race-casting-cylinder-head-final-order","title":"4P B-Series RACE CASTING Cylinder Head","description":"\u003cp\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e\u003c\/span\u003e  If you were part of our Pre-Order...good news you are ahead of MANY people in line.  You have been sent a discount code to your email address.  Enter your order number in the field below and enter your discount code at checkout.  This code will only work for people that purchased the pre-order.  This will credit your $300 pre-order deposit towards your final order.  Choose your options below to complete your purchase with your cylinder head the way you want it.  Heads will be processed in the order that these are submitted and received.  If you need to make other payment arrangements, email sales@team4piston.com or call 317-440-6777.\u003c\/p\u003e\n\u003ch2\u003eIntroducing the \u003cspan style=\"color: #f90707;\"\u003e4P B-Series Race Casting\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eWe have been working on the engineering behind the B-Series Race Casting for years, even before our K-Series.  We have taken everything we learned with the massive success of the K-Series program and applied that to the 4P B-Series Race Casting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAs Cast Cylinder Head\u003cbr\u003e\u003c\/strong\u003eThe \"As Cast\" cylinder head comes with valve job, surface, bronze valve guides, and billet cam caps.  It boasts 40-45 CFM gains over a stock GSR head even without porting.  This is a massive increase over stock cylinder heads but without the expense of CNC porting.  It flows more than ported offerings from many companies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCNC Race Ported Cylinder Head\u003c\/strong\u003e\u003cbr\u003eFor a little extra money, you get our CNC ported version, which takes airflow over 320 CFM even with a stock sized valve.  We ran these heads on select cars at WCF and they had to adjust their tunes and add fuel over their existing world record holding 4P Outlaw CNC cylinder heads. This port design isn't just high flow at high lift...these guys had to add 20+% fuel even at idle and low rpm.  It is a GAME CHANGER for making big power. First time on the track with this new 4P race ported head, the Speedfactory AWD Civic buried their World Record with a 6.6 second 1\/4 mile.  This head is the real deal.\u003c\/p\u003e\n\u003ch2\u003eWhy is this casting better?\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eAs OEM castings have gone out of production, those in the field have aged and worn, and the demands on our race engines have increased, we needed to develop a superior alternative to OEM.  The 4P Race Casting is superior in every way.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade IN THE USA from A356-T6 Aluminum, designed, tooled, cast, and finish machined all here in Indiana.\u003c\/li\u003e\n\u003cli\u003eBased on GSR B18C1 Architecture\u003c\/li\u003e\n\u003cli\u003eBillet cam caps with precision machining.  Tired of dealing with mismatched, missing, or worn cam caps?  These are so perfect, so smooth, and billet for extra strength and rigidity.\u003c\/li\u003e\n\u003cli\u003eExtra thick deck for increased rigidity, better gasket sealing, and high boost handling capabilities.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePort wall thickness is increased over OEM dramatically to allow us to run larger ports and move them around for high rpm applications.  Increased port wall thickness also allows for extreme boost applications and larger port designs.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAreas of the exhaust water jacket that crack in OEM cylinder heads with high EGTs are completely eliminated.  The head retains water and cooling, but we have moved it to different areas.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll heads accept VTEC and non-VTEC arrangement with OEM or aftermarket components.\u003c\/li\u003e\n\u003cli\u003eThese race ported heads are 100% designed, machined, and finished in house at 4 Piston Racing.  We will build you the head you need for your race or street program.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ciframe width=\"1103\" height=\"620\" src=\"https:\/\/www.youtube.com\/embed\/xgpvuAE-Rv0\" title=\"Revolutionizing the B-Series – Our New Cylinder Head Fully Assembled!\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":43244724289673,"sku":"4P-B-RC1","price":2900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/602A6335.jpg?v=1730839851"},{"product_id":"4p-circuit-pro-k-series-race-head","title":"4P Circuit Pro K-Series Race Head","description":"\u003cul\u003e\u003c\/ul\u003e\n\u003ch3 data-start=\"224\" data-end=\"279\" class=\"\"\u003eIntroducing the 4P \"Circuit Pro\" K-Series Race Head\u003c\/h3\u003e\n\u003cp data-start=\"281\" data-end=\"709\" class=\"\"\u003eThe \u003cstrong data-start=\"285\" data-end=\"304\"\u003e4P Race Casting\u003c\/strong\u003e has consistently delivered top-tier performance across motorsports disciplines. Proven in both \u003cstrong data-start=\"400\" data-end=\"413\"\u003eAll Motor\u003c\/strong\u003e and \u003cstrong data-start=\"418\" data-end=\"427\"\u003eTurbo\u003c\/strong\u003e classes, it sets the benchmark with superior materials, increased rigidity, and a motorsports-focused port and chamber design. While others remain constrained by OEM castings built for economy cars, we've engineered a cylinder head specifically for high-performance racing applications\u003c\/p\u003e\n\u003cp data-start=\"802\" data-end=\"1038\" class=\"\"\u003ePurpose-built for the latest generation of \u003cstrong data-start=\"845\" data-end=\"876\"\u003e4P Endurance Racing Engines\u003c\/strong\u003e, the \u003cstrong data-start=\"882\" data-end=\"897\"\u003eCircuit Pro\u003c\/strong\u003e lets you power your race car or performance street build with the same cutting-edge technology featured in our flagship competition engines.\u003c\/p\u003e\n\u003cp data-start=\"1040\" data-end=\"1053\" class=\"\"\u003eKey features:\u003c\/p\u003e\n\u003cul data-start=\"1054\" data-end=\"1326\"\u003e\n\u003cli data-start=\"1054\" data-end=\"1143\" class=\"\"\u003e\n\u003cp data-start=\"1056\" data-end=\"1143\" class=\"\"\u003e\u003cstrong data-start=\"1056\" data-end=\"1086\"\u003e20–28 CFM airflow increase\u003c\/strong\u003e over the Pro 156v2 head—without increasing port volume\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1054\" data-end=\"1143\" class=\"\"\u003e\n\u003cp data-start=\"1056\" data-end=\"1143\" class=\"\"\u003e\u003cstrong data-start=\"1146\" data-end=\"1178\"\u003eOptimized combustion chamber\u003c\/strong\u003e design for superior air\/fuel management and efficiency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1236\" data-end=\"1326\" class=\"\"\u003e\n\u003cp data-start=\"1238\" data-end=\"1326\" class=\"\"\u003e\u003cstrong data-start=\"1238\" data-end=\"1267\"\u003eMotorsports-grade casting\u003c\/strong\u003e, designed from the ground up—not modified from an OEM base\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1236\" data-end=\"1326\" class=\"\"\u003e36mm Intake Valve \/ 30mm Exhaust Valve\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1328\" data-end=\"1406\" class=\"\"\u003eThe \u003cstrong data-start=\"1332\" data-end=\"1347\"\u003eCircuit Pro\u003c\/strong\u003e is more than an upgrade—it's a platform built to dominate.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eCasting Design Features\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eAs OEM castings have gone out of production, those in the field have aged and worn, and the demands on our race engines have increased, we needed to develop a superior alternative to OEM.  The 4P Race Casting is superior in every way.\u003cstrong\u003e \u003cspan style=\"color: #fa0707;\"\u003eExclusively available at 4P.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMade IN THE USA from A356-T6 Aluminum\u003c\/li\u003e\n\u003cli\u003eThese \"porting castings\" give us a clean slate to put any port size and shape we choose, and offer a \"full cleanup\"\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePort wall thickness is increased over OEM dramatically to allow us to run larger ports and move them around for high rpm applications.  Increased port wall thickness also allows for extreme boost applications.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eExtra thick deck for increased rigidity and superior gasket sealing.\u003c\/li\u003e\n\u003cli\u003eSuperior cooling through 3D printed water jackets\u003c\/li\u003e\n\u003cli\u003eAll heads accept VTEC and non-VTEC arrangement with OEM or aftermarket components.\u003c\/li\u003e\n\u003cli\u003eThese race ported heads are 100% designed, machined, and finished in house at 4 Piston Racing.  We will build you the head you need for your race or street program.\u003c\/li\u003e\n\u003cli\u003eHeads available in PRB and RSP\/RBC Style water jacket arrangements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":43973882085513,"sku":"4P-CircuitPro","price":3200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/CircuitPro1.jpg?v=1746819196"},{"product_id":"4p-pro-tsx-cnc-head-black-friday-promo-copy","title":"4P TSX DOORBUSTER SPECIAL","description":"\u003cp\u003e\u003cstrong\u003eLIMITED TO FIRST 5 PURCHASES!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan data-olk-copy-source=\"MessageBody\"\u003eBLACK FRIDAY DOOR BUSTER!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is your shot to grab the 4P PRO TSX CNC Head for an \u003c\/span\u003e\u003cspan\u003eINSANE $1,195 — a $300 Door Buster discount and ONLY the first 5 buyers get it!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis CNC head is built to dominate:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-Fully CNC-ported intake \u0026amp; exhaust for max flow\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-Precision valve job + resurfacing included\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-Designed for killer mid-range and top-end power \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- Perfect for 2.0L all-motor, 2.0-2.4L boosted, and serious street\/track builds\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTurn your setup into a 340+ cfm powerhouse - this is the type of head that changes the whole attitude of your engine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDoor Buster quantities are extremely limited.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhen they're gone... they're gone.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":44952178098313,"sku":"4P-PROTSX-BF","price":1195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/DOOR_BUSTER_SPECIAL.jpg?v=1763826810"},{"product_id":"4p-pro-tsx-cnc-head-copy","title":"4P Cylinder Head Performance Rebuild (No Porting)","description":"\u003ch3 data-end=\"275\" data-start=\"236\"\u003e\u003cspan style=\"color: rgb(244, 16, 16);\"\u003eThis does not replace porting your cylinder head, a ported cylinder head will always outperform a Performance Rebuilt head.\u003c\/span\u003e\u003c\/h3\u003e\n\u003ch3 data-end=\"275\" data-start=\"236\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-end=\"275\" data-start=\"236\"\u003eBenefits of a Performance Valve Job\u003c\/h3\u003e\n\u003cp data-end=\"471\" data-start=\"277\"\u003eA performance valve job improves how efficiently the engine breathes by optimizing the valve-to-seat interface. Even without porting, it delivers meaningful gains in performance and reliability.\u003c\/p\u003e\n\u003cp data-end=\"498\" data-start=\"473\"\u003e\u003cstrong data-end=\"498\" data-start=\"473\"\u003eKey benefits include:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1557\" data-start=\"500\"\u003e\n\u003cli data-end=\"669\" data-start=\"500\"\u003e\n\u003cp data-end=\"669\" data-start=\"502\"\u003e\u003cstrong data-end=\"522\" data-start=\"502\"\u003eImproved airflow\u003c\/strong\u003e\u003cbr data-end=\"525\" data-start=\"522\"\u003eMulti-angle valve seats help air and exhaust gases transition more smoothly past the valves, increasing flow compared to a single factory cut.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"841\" data-start=\"671\"\u003e\n\u003cp data-end=\"841\" data-start=\"673\"\u003e\u003cstrong data-end=\"705\" data-start=\"673\"\u003eBetter sealing \u0026amp; compression\u003c\/strong\u003e\u003cbr data-end=\"708\" data-start=\"705\"\u003ePrecision-machined seats ensure the valves seal tightly, improving cylinder compression, throttle response, and overall efficiency.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"991\" data-start=\"843\"\u003e\n\u003cp data-end=\"991\" data-start=\"845\"\u003e\u003cstrong data-end=\"878\" data-start=\"845\"\u003eIncreased horsepower \u0026amp; torque\u003c\/strong\u003e\u003cbr data-end=\"881\" data-start=\"878\"\u003eBetter airflow and sealing translate into measurable power gains, especially in the mid- to upper-RPM range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1113\" data-start=\"993\"\u003e\n\u003cp data-end=\"1113\" data-start=\"995\"\u003e\u003cstrong data-end=\"1025\" data-start=\"995\"\u003eImproved throttle response\u003c\/strong\u003e\u003cbr data-end=\"1028\" data-start=\"1025\"\u003eThe engine reacts quicker to throttle input due to more efficient cylinder filling.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1261\" data-start=\"1115\"\u003e\n\u003cp data-end=\"1261\" data-start=\"1117\"\u003e\u003cstrong data-end=\"1141\" data-start=\"1117\"\u003eHigher RPM stability\u003c\/strong\u003e\u003cbr data-end=\"1144\" data-start=\"1141\"\u003eAccurate valve geometry and seat concentricity improve valve control, especially when paired with upgraded springs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1395\" data-start=\"1263\"\u003e\n\u003cp data-end=\"1395\" data-start=\"1265\"\u003e\u003cstrong data-end=\"1295\" data-start=\"1265\"\u003eLonger valve and seat life\u003c\/strong\u003e\u003cbr data-end=\"1298\" data-start=\"1295\"\u003eProper contact patterns reduce hot spots and wear, increasing durability under performance use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1557\" data-start=\"1397\"\u003e\n\u003cp data-end=\"1557\" data-start=\"1399\"\u003e\u003cstrong data-end=\"1442\" data-start=\"1399\"\u003eStronger foundation for future upgrades\u003c\/strong\u003e\u003cbr data-end=\"1445\" data-start=\"1442\"\u003eSupports performance camshafts, higher compression, or forced induction without needing to redo the head work.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1562\" data-start=\"1559\"\u003e\n\u003ch3 data-end=\"1605\" data-start=\"1564\"\u003eWhy it matters even with \u003cem data-end=\"1605\" data-start=\"1593\"\u003eno porting\u003c\/em\u003e\n\u003c\/h3\u003e\n\u003cp data-end=\"1814\" data-start=\"1606\"\u003eWhile porting changes the size and shape of the ports, a performance valve job maximizes the airflow potential of the \u003cstrong data-end=\"1748\" data-start=\"1724\"\u003eexisting port design\u003c\/strong\u003e, making it one of the most cost-effective cylinder head upgrades.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong style=\"font-size: 0.875rem;\" data-end=\"267\" data-start=\"232\"\u003eComplete disassembly \u0026amp; cleaning\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong style=\"font-size: 0.875rem;\" data-end=\"267\" data-start=\"232\"\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong style=\"font-size: 0.875rem;\" data-end=\"267\" data-start=\"232\"\u003eJetwash and media blast\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli data-end=\"309\" data-start=\"268\"\u003e\n\u003cp data-end=\"309\" data-start=\"270\"\u003e\u003cstrong data-end=\"290\" data-start=\"270\"\u003ePressure testing\u003c\/strong\u003e (check for cracks)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"390\" data-start=\"310\"\u003e\n\u003cp data-end=\"390\" data-start=\"312\"\u003e\u003cstrong data-end=\"341\" data-start=\"312\"\u003eSurface milling \/ decking\u003c\/strong\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"473\" data-start=\"391\"\u003e\n\u003cp data-end=\"473\" data-start=\"393\"\u003e\u003cstrong data-end=\"418\" data-start=\"393\"\u003ePerformance valve job\u003c\/strong\u003e (multi-angle valve seats for better sealing \u0026amp; airflow)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"500\" data-start=\"474\"\u003e\n\u003cp data-end=\"500\" data-start=\"476\"\u003e\u003cstrong data-end=\"500\" data-start=\"476\"\u003eNew valve stem seals\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"546\" data-start=\"501\"\u003e\n\u003cp data-end=\"546\" data-start=\"503\"\u003e\u003cstrong data-end=\"546\" data-start=\"503\"\u003eInspection and reconditioning of valves\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"728\" data-start=\"702\"\u003e\n\u003cp data-end=\"728\" data-start=\"704\"\u003e\u003cstrong data-end=\"728\" data-start=\"704\"\u003ePrecision reassembly\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch3 data-end=\"757\" data-start=\"730\"\u003eWhat “No Porting” means\u003c\/h3\u003e\n\u003cul data-end=\"949\" data-start=\"758\"\u003e\n\u003cli data-end=\"817\" data-start=\"758\"\u003e\n\u003cp data-end=\"817\" data-start=\"760\"\u003eIntake and exhaust ports are \u003cstrong data-end=\"817\" data-start=\"789\"\u003enot reshaped or enlarged\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"853\" data-start=\"818\"\u003e\n\u003cp data-end=\"853\" data-start=\"820\"\u003eFactory port geometry is retained\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"949\" data-start=\"854\"\u003e\n\u003cp data-end=\"949\" data-start=\"856\"\u003eImproves reliability and efficiency \u003cstrong data-end=\"949\" data-start=\"892\"\u003ewithout changing airflow characteristics dramatically\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":45072525787273,"sku":"4P-PerfRebuild","price":650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/602A6207.jpg?v=1768320770"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/collections\/gsr-3_2_420x_f07fb8c7-564b-4975-b0e3-ed9851f91227.jpg?v=1612466908","url":"https:\/\/4pistonracing.com\/collections\/cnc-cylinder-heads\/honda-s2000.oembed","provider":"4 Piston Racing","version":"1.0","type":"link"}