{"title":"Valve Springs","description":"","products":[{"product_id":"4pr-spr-1001k","title":"4 Piston Racing PSI Pro Stock Valve Spring and Titanium Retainer Kit","description":"\u003cp\u003eWe are proud to offer the highest quality, longest lasting valve springs for your K-Series and S2000 engine...Period. Valve control is one of the most important parts of making power and promoting long engine life. Too often springs are pushed beyond their functional limits and valves bounce out of control. We put these kits together after extensive testing and these are a must if you are racing competitively, turning high rpm, and running large camshafts. You can spend the money now and have a good spring that maintains valve control and lasts several race seasons, or buy cheap now and replace them a couple times a year...along with the other damage caused by out of control valves. We can also machine the seats to fine tune a pressure setting to suit your specific setup.\u003c\/p\u003e\n\u003ch2\u003e4PR-SPR-1001K - Pro Stock Race Spring\u003c\/h2\u003e\n\u003cp\u003eWe developed this single spring kit starting with a PSI Pro Stock single spring with Max Life Treatment and our own custom seat and retainer. This is a lightweight package with plenty of room to run large camshafts beyond .650 lift. 120lbs on the seat, 320lbs @ .600. Package comes with springs, spring seats, and titanium retainers. These have been proven year after year and have a VERY long service life, 20 times that of the cheaper alternatives on the market. Excellent protection against floating valves in the event of a missed gear. Max RPM 11,000+.\u003cbr\u003e\u003cbr\u003eThese springs have PROVEN 6-10hp gains in high rpm ranges over most springs available on the market.  You will find these 4P valve springs in more than 80% of the top all motor and turbo class cars....even under the valve covers of our competition.\u003c\/p\u003e\n\u003cp\u003eMADE WITH PRIDE IN THE USA!!\u003c\/p\u003e\n\u003cp\u003eFits K-Series and S2000\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471317307529,"sku":"4PR-SPR-1001K","price":850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/4pprostockvalvespring.jpg?v=1605476885"},{"product_id":"k-fs","title":"Ferrea Valve Spring Kit (K-Series)","description":"\u003cp\u003eThe KT4004 kit uses a S10100 valve spring is recommended for all applications where you are using a larger aftermarket cam, including road racing. Max recommended lift on this spring is .600\" and max recommended RPM is 9500.\u003cbr\u003e\u003cbr\u003eThe S10149 Spring is for use with very high lift cams and in applications where high spring pressure is necessary.  Also recommended for 1000hp+ turbo SFWD Applications.\u003c\/p\u003e\n\u003cp\u003eKits include spring bases, valve springs, titanium retainers, and valve locks\u003c\/p\u003e\n\u003ch2\u003e\u003c\/h2\u003e","brand":"4 Piston Racing","offers":[{"title":"KT4004 (S10100) \/ Titanium","offer_id":34524647391369,"sku":"Kt4004","price":1002.0,"currency_code":"USD","in_stock":true},{"title":"KT4035 (S10149) \/ Titanium","offer_id":34524647325833,"sku":"KT4035","price":1217.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/ferrea_spring_retainer_kit_1_1_ae2c70f6-9267-4a24-9877-6d1823b1d8ee.jpg?v=1605502672"},{"product_id":"sprk-h1021d","title":"Supertech Valve Spring Kit (K-Series)","description":"\u003cp\u003eThis spring is suitable for most all motor and turbo applications to 9500 rpm.  We recommend a max lift of .600\" and 9500 max rpm.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSPRK-H1021D\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471317405833,"sku":"SPRK-H1021D","price":485.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/supertechsprings_1.jpg?v=1605507081"},{"product_id":"b-fs","title":"Ferrea Valve Spring and Titanium Retainer Kits (B-Series VTEC)","description":"\u003cp\u003eThere are many Ferrea springs available for B-Series.  We only list the ones that we will use in our own engines for the applications that you all are using your engines in.  Regardless of their descriptions, we highly recommend the S10086 spring (Kit 4036) for any all motor street or turbo application.  They can be used for high hp turbo applications in the 1000hp range, and up to 10,000 rpm.  If you require a heavier duty spring for more power and RPM please use the 4 Piston SFWD spring.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eKT4001 - S10070 - Seat Pressure 80 lb, Max Lift 14mm\u003cbr\u003eKT4002 - S10027 - Seat Pressure 100 lb, Max Lift 13.5mm\u003cbr\u003eKT4027 - S10104 - Seat Pressure 80 lb Max Lift 13.5\u003cbr\u003eKT4036 - S10086 - Seat Pressure 110 lb, Max Lift 13mm (Recommended by 4P for most applications)\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"KT4001","offer_id":34524645982345,"sku":"KT4001","price":1002.0,"currency_code":"USD","in_stock":true},{"title":"KT4002","offer_id":34524646015113,"sku":"KT4002","price":1002.0,"currency_code":"USD","in_stock":true},{"title":"KT4027","offer_id":34524646047881,"sku":"KT4027","price":1002.0,"currency_code":"USD","in_stock":true},{"title":"KT4036","offer_id":34524646080649,"sku":"KT4036","price":1002.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/ferrea_spring_retainer_kit_1_1.jpg?v=1605502580"},{"product_id":"sprk-h100dr","title":"Supertech Valve Spring Kit (B-Series)","description":"\u003cp\u003eThese springs are suited for the weekend racer working with a limited budget. We recommend the higher spring pressure option for turbo or all motor.\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471317569673,"sku":"SPRK-H100DR","price":380.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/supertechsprings_1_726df0de-6706-45c3-a100-8c3ee935321a.jpg?v=1605507186"},{"product_id":"sprk-h100","title":"Supertech Valve Spring Kit (H Series)","description":"\u003cp\u003eThese springs are suited for the weekend racer working with a limited budget. We recommend the higher spring pressure option for turbo or all motor.\u003c\/p\u003e\n\u003ch2\u003ePart Numbers\u003c\/h2\u003e\n\u003cp\u003eH1000D - Seat Pressure 80 lb, Max Lift 14.8mm\u003cbr\u003e\nH1005D - Seat Pressure 93 lb, Max Lift 14.8mm\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"H1000D - 80lb","offer_id":34524765585545,"sku":"SPRK-H100","price":410.0,"currency_code":"USD","in_stock":true},{"title":"H1005D - 93lb","offer_id":34524765618313,"sku":"SPRK-H101","price":410.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/supertechsprings_1_5db2cc62-d4ae-4dca-8583-3c4f59f0c110.jpg?v=1605507163"},{"product_id":"4pr-v","title":"Viton Valve Seals","description":"\u003ch2\u003eValve Seals\u003c\/h2\u003e\n\u003cp\u003eComplete set of 16 Viton valve stem seals, high temp Viton material\u003cbr\u003e\u003cbr\u003eHonda B-Series VTEC\u003cbr\u003eHonda H-Series\u003cbr\u003eHonda K-Series\u003cbr\u003eHonda S2000\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Honda B Series","offer_id":34524148826249,"sku":"4PR-V-1","price":30.0,"currency_code":"USD","in_stock":true},{"title":"Honda K Series","offer_id":34524148859017,"sku":"4PR-V-2","price":30.0,"currency_code":"USD","in_stock":true},{"title":"Honda H Series","offer_id":34524148891785,"sku":"4PR-V-3","price":30.0,"currency_code":"USD","in_stock":true},{"title":"Honda S2000","offer_id":34524148924553,"sku":"4PR-V-4","price":30.0,"currency_code":"USD","in_stock":true},{"title":"Mitsubishi EVO 8\/9","offer_id":34524148957321,"sku":"4PR-V-5","price":30.0,"currency_code":"USD","in_stock":true},{"title":"Mitsubishi EVO X","offer_id":34524148990089,"sku":"4PR-V-6","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/valveseal.jpg?v=1605483687"},{"product_id":"kt4033","title":"Ferrea Valve Spring Kit K20C1 Honda Civic Type R","description":"\u003cp\u003eThe OEM Honda valvetrain can handle bursts to 7000 rpm, but there have been failures with extended periods of continuous RPM at that level.  The Ferrea valve spring kit uses a high quality PAC spring Made in the USA.  It increases the seat pressure more than 20 psi on the seat to help control valve bounce and will allow safe operation up to and beyond 9000 rpm.  This is especially critical in the event of a missed gear or mechanical over rev.\u003c\/p\u003e  \n\n\u003cp\u003eIncludes:\u003cbr\u003e\nS10165- 16\u003cbr\u003e\nE20056- 16\u003cbr\u003e\nSL1151- 8\u003cbr\u003e\nSL1152- 8\u003cbr\u003e\nK10116- 16\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471323926665,"sku":"KT4033","price":850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/k20c1ferrea1.jpg?v=1605502766"},{"product_id":"kt4038","title":"Ferrea Roller Rocker and Valve Spring Kit KT4038 - K20C1","description":"\u003cp\u003eThe Ferrea Roller Rocker kit will eliminate the VTEC function on your exhaust cam, and replace the OEM intake rocker with the Ferrea rocker arm.  The Ferrea valve spring kit uses a high quality PAC spring Made in the USA.  It increases the seat pressure and open pressure to help control valve bounce and will allow safe operation up to and beyond 9000 rpm.  This is especially critical in the event of a missed gear or mechanical over rev.  We recommend this for experienced engine builders.\u003c\/p\u003e\n\n\u003cp\u003eThis kit includes the rocker arms, valve spring, ti retainers, spring seats, and valve locks.\u003c\/p\u003e\n\n\u003cp\u003eIncludes:\u003c\/p\u003e\n\n\u003cp\u003eRR1006 - 8\u003cbr\u003e\nS10166- 16\u003cbr\u003e\nE11142- 16\u003cbr\u003e\nSL1154- 8\u003cbr\u003e\nSL1153- 8\u003cbr\u003e\nK10116- 16\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":34471358201993,"sku":"KT4038","price":2300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/ferrearr1006-2.jpg?v=1604862583"},{"product_id":"supertech-valve-spring-kit-k24z-r40","title":"Supertech Valve Spring Kit (K24Z R40)","description":"\u003cdiv\u003eSupertech Dual Valve Spring Kit for Honda K24Z2, K24Z3, K24Z7 9th Generations Civic.\u003c\/div\u003e\n\u003cul data-mce-fragment=\"1\" class=\"item-description\"\u003e\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\" class=\"item-description\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eType:\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDual Spring\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003ePress.Seat:\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e86 @33.4\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eMax Lift:\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e14.90mm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eCoil Bind:\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e18.50mm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eRate:\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e12.50mm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eSpring :\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eSPR-H100-DR-Z7\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eRetainer:\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eRET-K24Z7\/T1\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eSeat Locator :\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eSEAT-H1020DS\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eSpring Shim :\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eSS-3011-3\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eKeepers (locks):\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eKPR-5.5\/7A-ST\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":40009197060233,"sku":"SPRK-H100DR-Z7","price":595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/supertechsprings_1_21d43af0-ba8c-4640-bb21-e2717063b882.jpg?v=1645287477"},{"product_id":"4p-trktr3-valve-spring-kit-k20c1-for-tr3","title":"4P TRKTR3 Valve Spring Kit K20C1 for TR3","description":"This 4 Piston Valve Spring Kit is used with the 4P TR3 Billet Camshafts.  Other valve spring kits may coil bind with this camshaft, so make sure your engine builder checks.  If you are doing this at home, make sure you have THIS KIT.","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":40228552573065,"sku":"4P-TRKTR3","price":850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/products\/k20c1ferrea1_0218150e-dbda-45db-9bf4-8a18209c178a.jpg?v=1650053671"},{"product_id":"4-piston-high-performance-street-valve-spring-kit-k-series","title":"4 Piston High Performance Street Valve Spring Kit (K-Series)","description":"\u003cp\u003e4 Piston Racing is proud to introduce a superior valve spring at a realistic price point.  Many of the K-Series valve springs currently on the market were developed so long ago that they did not consider the RPM range and camshaft size of today's Honda K-Series performance engines.\u003c\/p\u003e\n\u003cp\u003eWe have developed this valve spring kit with high purity large diameter wire so that you can run any of the popular camshafts on the market and operate the engine at higher RPM without the risk of valve float.  The retainers are a premium Titanium manufactured right here on our Mazak SYNCREX Swiss lathe to tolerances that only this type of premium equipment can achieve.  You will be happy with the packaging and presentation, and even happier with the performance and longevity.\u003c\/p\u003e\n\u003cp\u003e100% MADE IN USA\u003c\/p\u003e\n\u003cp\u003eSeat Pressure - 110 lbs.\u003cbr\u003eMax Lift - .650\" (16.5mm)\u003c\/p\u003e\n\u003cp\u003e**We have had some questions and comments regarding the higher seat pressure of these as opposed to other lower pressure offerings on the market.  The whole reason we made this product was because those lower pressure springs are insufficient to control the valve.  Our higher pressure spring is made to make your valvetrain last LONGER.**\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eThe Kit Includes the Following\u003c\/strong\u003e\u003cbr\u003e- 16 Dual Valve Springs\u003cbr\u003e- 16 Spring Seat Locators\u003cbr\u003e- 16 Titanium Retainers\u003c\/p\u003e\n\u003cp\u003eYou use any 7 degree valve lock (keeper) with these retainers.  OEM, Ferrea, Supertech, or 4P\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/6ofnannvMVU?si=FCwM-PVdlFRgG7sp\u0026amp;controls=0\" 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","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":41572009705609,"sku":"4PR-VSK-2001","price":595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/4PR-VSK-2001.4.logo.jpg?v=1763659224"},{"product_id":"4-piston-advanced-performance-race-valve-spring-kit-k-series","title":"4 Piston Advanced Performance RACE Valve Spring Kit (K-Series)","description":"\u003cp\u003e4 Piston Racing is proud to introduce a superior valve spring at a competitive price point.  Many of the K-Series valve springs currently on the market were developed so long ago that they did not consider the RPM range and camshaft size of today's Honda K-Series performance engines.\u003c\/p\u003e\n\u003cp\u003eWe have developed this valve spring kit with high purity large diameter wire so that you can run any of the popular camshafts on the market and operate the engine at higher RPM without the risk of valve float.  It features our nitriding treatment and Pro Polish to deliver a motorsport grade spring that will withstand rigorous endurance applications.  The retainers are a premium Titanium manufactured right here on our Mazak SYNCREX Swiss lathe to tolerances that only this type of premium equipment can achieve.  You will be happy with the packaging and presentation, and even happier with the performance and longevity.  This is the spring that you will find in our highest level endurance race engines.\u003c\/p\u003e\n\u003cp\u003e100% MADE IN USA\u003c\/p\u003e\n\u003cp\u003eSeat Pressure - 120 lbs.\u003cbr\u003eMax Lift - .650\" (16.5mm)\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e**We have had some \u003c\/span\u003e\u003cspan\u003equestions and comments\u003c\/span\u003e\u003cspan\u003e regarding the\u003c\/span\u003e\u003cspan\u003e higher seat pressure of these as opposed to other lower pressure offerings on the market.  The whole reason we made this product was because those\u003c\/span\u003e\u003cspan\u003e lower pressure springs are insufficient to control the valve.  Our higher pressure spring is made to make your valvetrain last LONGER.**\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eThe Kit Includes the Following\u003c\/strong\u003e\u003cbr\u003e- 16 Pro Polished Dual Valve Springs\u003cbr\u003e- 16 Spring Seat Locators\u003cbr\u003e- 16 Titanium Retainers\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYou use any 7 degree valve lock (keeper) with these retainers.  OEM, Ferrea, Supertech, or 4P\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/6ofnannvMVU?si=FCwM-PVdlFRgG7sp\u0026amp;controls=0\" 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\/span\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":41572636524681,"sku":"4PR-VSK-2002","price":725.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/4PR-VSK-2002.1.logo.jpg?v=1763662883"},{"product_id":"4-piston-advanced-performance-race-valve-spring-kit-s2000","title":"4 Piston Advanced Performance RACE Valve Spring Kit (S2000)","description":"\u003cp\u003e4 Piston Racing is proud to introduce a superior valve spring at a competitive price point.  Many of the valve springs currently on the market were developed so long ago that they did not consider the RPM range and camshaft size of today's Honda performance engines.\u003c\/p\u003e\n\u003cp\u003eWe have developed this valve spring kit with high purity large diameter wire so that you can run any of the popular camshafts on the market and operate the engine at higher RPM without the risk of valve float.  It features our nitriding treatment and Pro Polish to deliver a motorsport grade spring that will withstand rigorous endurance applications.  The retainers are a premium Titanium manufactured right here on our Mazak SYNCREX Swiss lathe to tolerances that only this type of premium equipment can achieve.  You will be happy with the packaging and presentation, and even happier with the performance and longevity.  This is the spring that you will find in our highest level endurance race engines.\u003c\/p\u003e\n\u003cp\u003e100% MADE IN USA\u003c\/p\u003e\n\u003cp\u003eSeat Pressure - 120 lbs.\u003cbr\u003eMax Lift - .650\" (16.5mm)\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e**We have had some \u003c\/span\u003e\u003cspan\u003equestions and comments\u003c\/span\u003e\u003cspan\u003e regarding the\u003c\/span\u003e\u003cspan\u003e higher seat pressure of these as opposed to other lower pressure offerings on the market.  The whole reason we made this product was because those\u003c\/span\u003e\u003cspan\u003e lower pressure springs are insufficient to control the valve.  Our higher pressure spring is made to make your valvetrain last LONGER.**\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eThe Kit Includes the Following\u003c\/strong\u003e\u003cbr\u003e- 16 Pro Polished Dual Valve Springs\u003cbr\u003e- 16 Spring Seat Locators\u003cbr\u003e- 16 Titanium Retainers\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYou use any 7 degree valve lock (keeper) with these retainers.  OEM, Ferrea, Supertech, or 4P\u003c\/span\u003e\u003c\/p\u003e","brand":"4 Piston Racing","offers":[{"title":"Default Title","offer_id":42358478471305,"sku":"4PR-VSF-2002","price":725.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4800\/7561\/files\/4PR-VSK-2002.1.logo_0060d57d-d7d9-4175-ab64-eff25d1f47ff.jpg?v=1763660915"},{"product_id":"high-performance-valve-guides","title":"High Performance Valve Guides","description":"\u003cp\u003eComplete set of 16 High Performance Valve Guides.  Precision machined in-house 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