{"title":"Valve Springs \u0026 Hardware","description":null,"products":[{"product_id":"3vpm-1436-dual-spring-kit-650-690-lift","title":"3VPM-1436 DUAL SPRING KIT - .650-.690\" LIFT","description":"\u003ch1\u003e\u003cspan\u003e3V Performance LS Premium 10° Dual Valve Spring Package\u003c\/span\u003e\u003c\/h1\u003e\n\u003ch2\u003e\u003cspan\u003eExclusive 10-Degree Retainer and Lock System — .650\"–.690\" Lift\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3V Performance LS Dual Valve Spring Package\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is engineered for high-performance LS combinations requiring greater spring pressure, stability, and valve control than a conventional drop-in spring kit can provide.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUnlike typical LS packages that use standard 7-degree hardware, our package features an exclusive \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003epremium 10-degree hardened chromoly retainer and lock system\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e—a combination that provides increased locking-surface contact and secure valve-stem engagement in demanding performance applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe matched dual-spring design provides dependable valvetrain control for aggressive hydraulic-roller and solid-roller camshafts. With multiple installed-height options, the package can be configured to deliver the seat pressure and available valve lift required for a wide range of naturally aspirated, boosted, and nitrous-assisted LS combinations.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eThe 3V Performance Difference\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eExclusive premium 10-degree retainer and lock system\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHardened chromoly retainers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHardened 10-degree valve locks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh-performance dual valve springs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncreased spring stability and valvetrain control\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMultiple installed-height and seat-pressure options\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSupports .650\"–.690\" valve lift when properly installed and verified\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for aggressive hydraulic-roller and solid-roller camshafts\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for naturally aspirated and power-adder applications\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003ePackage Includes\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e16 high-performance dual valve springs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e16 hardened chromoly 10-degree retainers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e32 premium hardened 10-degree valve locks\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e16 valve-stem seals\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e16 hardened valve-spring locators\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eDual Valve Spring Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSpring design: Dual\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSeat pressure: 170 lb at 1.780\"\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSeat pressure: 160 lb at 1.800\"\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSeat pressure: 145 lb at 1.850\"\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOpen pressure: 415 lb at 1.112\"\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRecommended valve-lift range: .650\"–.690\"\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCoil-bind height: 1.060\"\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eInstallation Requirements\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis is a precision performance valvetrain package. All installed heights, spring pressures, and running clearances must be measured during installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBefore assembly:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThoroughly clean every component and mating surface.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMeasure the installed height of all 16 valve springs.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSelect the installed height necessary to obtain the camshaft manufacturer’s required seat pressure.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdd the appropriate hardened shims beneath the spring locator when necessary to obtain the required installed height and spring pressure.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVerify actual spring pressure at the measured installed height.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVerify actual coil-bind clearance at maximum valve lift.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVerify retainer-to-valve-seal and retainer-to-valve-guide clearance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVerify the inner and outer springs are correctly located and seated.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eApply a thin film of clean engine oil or assembly lubricant to all mating surfaces.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConfirm that the final seat and open pressures meet the camshaft manufacturer’s requirements.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eImportant Installation Notice\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e.650\"–.690\" lift range\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e depends on the engine’s measured spring installed height, actual coil-bind height, and required safety clearance. Higher-lift applications may require a taller installed height to maintain adequate coil-bind clearance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eNever rely on an advertised maximum-lift rating alone. Failure to verify installed height, spring pressure, coil-bind clearance, retainer clearance, and valvetrain geometry can result in severe valvetrain or engine damage.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eProfessional installation is strongly recommended.\u003c\/span\u003e\u003c\/p\u003e","brand":"3V Performance","offers":[{"title":"Default Title","offer_id":39547416412211,"sku":"3VPM-1436","price":459.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/IMG_3224.jpg?v=1705961636"},{"product_id":"3vpp-5131-16-dual-spring-kit-650-690-lift","title":"3VPP-5131-16 DUAL SPRING KIT - .650-.690\" LIFT","description":"\u003cp\u003e\u003cstrong\u003e3VPP-5131 DUAL SPRING KIT - .650-.690\" LIFT\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSpring specs:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e•195 lbs @ 1.750\"\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e•145 lbs @ 1.850\"\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e•485lbs @ 1.110\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e•Coil bind @ 1.000\"\u003c\/span\u003e\u003c\/p\u003e","brand":"3V Performance","offers":[{"title":"Default Title","offer_id":39915474878515,"sku":"3VPP-5131","price":689.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/products\/PRODUCT_PICTURE_TEMPLATE.svg-g1359-9-474_34292468-8917-4ea3-8df5-8fb86a42fd53.png?v=1787777036"},{"product_id":"3vpp-5131-16-dual-spring-kit-650-690-lift-copy","title":"3V Performance Gen V LT L83\/L86 Beehive Valve Spring Kit, 10° Hardware | 3VP-GENV1516MLKIT","description":"\u003ch2\u003eGen V LT Beehive Valve Spring Package with 10° Hardware\u003c\/h2\u003e\n\u003cp\u003eBuild your Gen V LT valvetrain around PSI LS1516ML Max Life beehive springs and a matched 10-degree hardened chromoly retainer and hardened lock system. Designed for performance camshaft applications, this 3V Performance package combines beehive springs with the retainers, locks, locators and valve-stem seals listed below.\u003c\/p\u003e\n\u003cp\u003eThe lightweight beehive design reduces valvetrain mass. The springs support up to .670-inch valve lift when properly installed and verified. Actual allowable lift depends on your measured clearances and installed height.\u003c\/p\u003e\n\u003ch2\u003ePackage Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e16 PSI LS1516ML Max Life beehive valve springs\u003c\/li\u003e\n\u003cli\u003e16 R502-16 hardened chromoly 10-degree retainers\u003c\/li\u003e\n\u003cli\u003e32 3VP-L011 premium hardened 10-degree valve locks\u003c\/li\u003e\n\u003cli\u003e16 LVS-1700 valve-stem seals\u003c\/li\u003e\n\u003cli\u003e16 3VP-LBH60520 hardened beehive valve-spring locators\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePSI LS1516ML Spring Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSpring design: Beehive\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 1.290\"\u003c\/li\u003e\n\u003cli\u003eOuter inside diameter: .640\"\u003c\/li\u003e\n\u003cli\u003eSeat pressure: 150 lb at 1.800\"\u003c\/li\u003e\n\u003cli\u003eOpen pressure: 420 lb at 1.140\"\u003c\/li\u003e\n\u003cli\u003eSpring rate: 409 lb\/in\u003c\/li\u003e\n\u003cli\u003eMaximum valve lift: .670\"\u003c\/li\u003e\n\u003cli\u003eCoil-bind height: 1.080\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Requirements\u003c\/h2\u003e\n\u003cp\u003eThis is a precision performance valvetrain package. All clearances and installed heights must be measured during installation.\u003c\/p\u003e\n\u003cp\u003eBefore assembly:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThoroughly clean every component and mating surface.\u003c\/li\u003e\n\u003cli\u003eMeasure the installed height of all 16 valve springs.\u003c\/li\u003e\n\u003cli\u003eTarget a 1.800-inch installed height unless otherwise directed by the camshaft manufacturer.\u003c\/li\u003e\n\u003cli\u003eAdd the appropriate hardened shims beneath the spring locator when necessary to obtain the required installed height and spring pressure.\u003c\/li\u003e\n\u003cli\u003eVerify actual coil-bind clearance at maximum valve lift.\u003c\/li\u003e\n\u003cli\u003eVerify retainer-to-valve-seal and retainer-to-valve-guide clearance.\u003c\/li\u003e\n\u003cli\u003eApply a thin film of clean engine oil or assembly lubricant to all mating surfaces.\u003c\/li\u003e\n\u003cli\u003eConfirm that the final seat and open pressures meet the camshaft manufacturer’s requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eImportant Installation Notice\u003c\/h2\u003e\n\u003cp\u003eThe .670-inch rating represents the spring’s maximum advertised lift capability. Actual allowable valve lift depends on measured installed height, actual coil-bind height and required safety clearance.\u003c\/p\u003e\n\u003cp\u003eNever rely on the advertised maximum-lift rating alone. Failure to verify installed height, spring pressure, coil-bind clearance and retainer clearance can result in severe valvetrain or engine damage.\u003c\/p\u003e\n\u003cp\u003eProfessional installation is strongly recommended.\u003c\/p\u003e","brand":"3V Performance","offers":[{"title":"Default Title","offer_id":54374450463033,"sku":"3VP-GENV1516MLKIT","price":549.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/products\/PRODUCT_PICTURE_TEMPLATE.svg-g1359-9-474_34292468-8917-4ea3-8df5-8fb86a42fd53.png?v=1787777036"},{"product_id":"pac-racing-300-series-valve-spring-retainers-pac-r315-16","title":"PAC Racing R315-16 Chromoly Dual Valve Spring Retainers, 10°, Set of 16","description":"\u003ch2\u003ePAC Racing 300 Series Dual Valve Spring Retainers\u003c\/h2\u003e\n\u003cp\u003eFinish your dual valve spring setup with PAC Racing R315-16 retainers. Made from chromoly steel, these 300 Series retainers are CNC-machined and heat-treated to withstand wear and abrasion.\u003c\/p\u003e\n\u003cp\u003eThis set includes 16 retainers with a standard 10-degree lock angle.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSKU: PAC-R315-16\u003c\/li\u003e\n\u003cli\u003eSeries: 300 Series\u003c\/li\u003e\n\u003cli\u003eValve spring type: Dual\u003c\/li\u003e\n\u003cli\u003eMaterial: Chromoly steel\u003c\/li\u003e\n\u003cli\u003eValve lock style: Standard 10 degree\u003c\/li\u003e\n\u003cli\u003eValve lock angle: 10°\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 1.475 in.\u003c\/li\u003e\n\u003cli\u003eFirst step diameter: 1.110 in.\u003c\/li\u003e\n\u003cli\u003eSecond step diameter: 0.710 in.\u003c\/li\u003e\n\u003cli\u003eQuantity: 16 retainers\u003c\/li\u003e\n\u003cli\u003eGTIN: 00193564538031\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpring Compatibility\u003c\/h2\u003e\n\u003cp\u003eListed to fit PAC 1227, 1239, 1297, 1341 and 1509 valve springs, including marine applications.\u003c\/p\u003e\n\u003cp\u003eConfirm spring dimensions and valve lock compatibility for your application before ordering.\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67721987457337,"sku":"PAC-R315-16","price":86.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/pacsteelretainer.png?v=1792497291"},{"product_id":"pac-r450-16-fits-rpm-series-dual-valve-springs-1-240-in-od-0-685-in-second-step-diameter-8-degree-lock-angle-titanium","title":"PAC-R450-16 Fits RPM Series Dual Valve Springs – 1.240 in. 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The 400 series is designed to have enhanced strength and is a lightweight option while retaining a value-oriented price for beehive, dual, and triple valve springs.\u003c\/p\u003e\n\u003cp\u003e6AL4V titanium construction\u003cbr\u003eManufactured to exacting standards\u003cbr\u003eAvailable in beehive, dual, and triple spring configurations.\u003cbr\u003eEnhanced strength and light weight will retaining a budget-conscious price point.\u003c\/p\u003e\n\u003cp\u003eSpecifications\u003cbr\u003eValve Spring Type    \u003cbr\u003eDual\u003c\/p\u003e\n\u003cp\u003eValve Lock Style    \u003cbr\u003eMini 8 Degree\u003c\/p\u003e\n\u003cp\u003eValve Lock Angle    \u003cbr\u003e8 DD\u003c\/p\u003e\n\u003cp\u003eValve Spring Retainer Quantity    \u003cbr\u003e16\u003c\/p\u003e\n\u003cp\u003eValve Spring Retainer Material    \u003cbr\u003eTitanium\u003c\/p\u003e\n\u003cp\u003eValve Spring Retainer Series    \u003cbr\u003eDual Spring 400 Series\u003c\/p\u003e\n\u003cp\u003eFirst Step Diameter    \u003cbr\u003e0.940 IN\u003c\/p\u003e\n\u003cp\u003eSecond Step Diameter    \u003cbr\u003e0.685 IN\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67722516562233,"sku":"PAC-R450-16","price":291.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/pactiretainer.png?v=1792505166"},{"product_id":"pac-r363-16-fits-pac-1211-1215-1218-1219-1220-1275-1286-1-035-in-od-7-degree-lock-angle-chromoly-steel","title":"PAC-R363-16 Fits PAC-1211\/1215\/1218\/1219\/1220\/1275\/1286 – 1.035 in. OD – 7 Degree Lock Angle – Chromoly Steel","description":"\u003cp\u003eFits PAC-1211\/1215\/1218\/1219\/1220\/1275\/1286 – 1.035 in. OD – 7 Degree Lock Angle – Chromoly Steel\u003c\/p\u003e\n\u003cp\u003ePAC Racing 300 Series spring retainers are made of chromoly steel manufactured with precise CNC machinery and heat-treated to withstand wear and abrasion. They are available in beehive, single, and dual spring versions for budget-minded performance without sacrificing quality or durability.\u003c\/p\u003e\n\u003cp\u003eChromoly construction\u003cbr\u003eCNC-machined and heat-treated to withstand wear and abrasion\u003cbr\u003eAvailable in beehive and dual spring versions\u003cbr\u003eDesigned for budget-minded performance without sacrificing quality.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eNote    \u003cbr\u003eFits 1211, 1215, 1218, 1219, 1220, and 1286\u003c\/p\u003e\n\u003cp\u003eValve Spring Type    \u003cbr\u003eBeehive\u003c\/p\u003e\n\u003cp\u003eValve Lock Style    \u003cbr\u003eStandard 7 Degree\u003c\/p\u003e\n\u003cp\u003eValve Lock Angle    \u003cbr\u003e7 DD\u003c\/p\u003e\n\u003cp\u003eValve Spring Retainer Quantity    \u003cbr\u003e16\u003c\/p\u003e\n\u003cp\u003eValve Spring Retainer Material    \u003cbr\u003eChrome Moly Steel\u003c\/p\u003e\n\u003cp\u003eOutside Diameter    \u003cbr\u003e1.035 IN\u003c\/p\u003e\n\u003cp\u003eFirst Step Diameter    \u003cbr\u003e0.640 IN\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67722543923513,"sku":"PAC-R363-16","price":86.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/r363.png?v=1792505701"},{"product_id":"pac-r435-16-fits-most-rpm-dual-ls-valve-springs-1-300-in-od-0-680-in-second-step-diameter-7-degree-lock-angle-titanium","title":"PAC-R435-16 Fits Most RPM Dual LS Valve Springs – 1.300 in. OD – 0.680 in. Second Step Diameter – 7 Degree Lock Angle – Titanium","description":"\u003cp\u003eFits Most RPM Dual LS Valve Springs – 1.300 in. OD – 0.680 in. Second Step Diameter – 7 Degree Lock Angle – Titanium\u003c\/p\u003e\n\u003cp\u003ePAC Racing’s 400 Series Spring Retainers are constructed of grade 6AL4V titanium manufactured to exacting standards. The 400 series is designed to have enhanced strength and is a lightweight option while retaining a value-oriented price for beehive, dual, and triple valve springs.\u003c\/p\u003e\n\u003cp\u003e6AL4V titanium construction\u003cbr\u003eManufactured to exacting standards\u003cbr\u003eAvailable in beehive, dual, and triple spring configurations.\u003cbr\u003eEnhanced strength and ligh weight will retaining a budget-concious pricepoint.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eValve Spring Type    \u003cbr\u003eDual\u003c\/p\u003e\n\u003cp\u003eValve Lock Style    \u003cbr\u003eLS 7 Degree\u003c\/p\u003e\n\u003cp\u003eValve Lock Angle    \u003cbr\u003e7 DD\u003c\/p\u003e\n\u003cp\u003eValve Spring Retainer Quantity    \u003cbr\u003e16\u003c\/p\u003e\n\u003cp\u003eValve Spring Retainer Material    \u003cbr\u003eTitanium\u003c\/p\u003e\n\u003cp\u003eValve Spring Retainer Series    \u003cbr\u003eDual Spring 400 Series\u003c\/p\u003e\n\u003cp\u003eFirst Step Diameter    \u003cbr\u003e0.940 IN\u003c\/p\u003e\n\u003cp\u003eSecond Step Diameter    \u003cbr\u003e0.680 IN\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67722572497209,"sku":"PAC-R435-16","price":291.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/R435-16.png?v=1792506376"},{"product_id":"pac-r455-16-fits-pac-1222x-1-225-in-od-0-650-in-second-step-diameter-7-degree-lock-angle-titanium","title":"PAC-R455-16 Fits PAC-1222X – 1.225 in. 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Tool steel options have improved wear and durability characteristics over traditional spring seats.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eValve Spring Type    \u003cbr\u003eDual\u003c\/p\u003e\n\u003cp\u003eOutside Diameter    \u003cbr\u003e1.450 IN\u003c\/p\u003e\n\u003cp\u003eFirst Step Diameter    \u003cbr\u003e0.700 IN\u003c\/p\u003e\n\u003cp\u003eSecond Step Diameter    \u003cbr\u003e0.570 IN\u003c\/p\u003e\n\u003cp\u003eMaterial    \u003cbr\u003eChrome Moly\u003c\/p\u003e\n\u003cp\u003ePAC Racing Valve Spring Seats and Cups\u003c\/p\u003e\n\u003cp\u003ePAC Racing valve spring seats and cups are a great way to prevent dancing springs, which would tear up your aluminum heads. High-performance racing engines place extreme pressure on the springs. These retainers are essential for use on aluminum heads. 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PAC Racing has taken years of research and coupled that with exotic new heat treatment methods to produce the next generation of drag racing valve springs. The 1300 Series springs feature a 15-30% reduction in physical mass. This, coupled with a natural frequency increase of 20%, enables your engine to rev higher, faster, and last longer even with aggressive camshaft profiles. These springs are constructed of our signature PACaloy super clean wire and are heat-treated in-house for precise spring rates and enhanced strength. They undergo a multi-peen process to optimize service life as well. Unique to the 1300 Series, these springs then receive ID\/OD chamfer finishing, a run through the polisher, and a Nano-Peen™ proprietary surface treatment to improve operating cycles.\u003c\/p\u003e\n\u003cp\u003eBuilt using our signature PACaloy super clean wire to ensure strength and durability\u003cbr\u003eIn-house heat-treating for precise spring rates and increased strength\u003cbr\u003eMulti-peen process to optimize service life\u003cbr\u003eID\/OD chamfer finishing\u003cbr\u003ePolishing to improve operating cycles\u003cbr\u003eNano-Peen™ Proprietary Surface Treatment\u003c\/p\u003e\n\u003cp\u003eOuter Diameter – Outer Valve Spring    \u003cbr\u003e1.374 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Outer Valve Spring    \u003cbr\u003e1.000 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Inner Valve Spring    \u003cbr\u003e0.716 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Height    \u003cbr\u003e1.950 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Load    \u003cbr\u003e150 PS\u003c\/p\u003e\n\u003cp\u003eOpen Height    \u003cbr\u003e1.250 IN\u003c\/p\u003e\n\u003cp\u003eOpen Load    \u003cbr\u003e455 PS\u003c\/p\u003e\n\u003cp\u003eOpen Load \/ Height (Valve Open)    \u003cbr\u003e455 LB @ 1.250 IN\u003c\/p\u003e\n\u003cp\u003eValve Spring Rate    \u003cbr\u003e436 PS\u003c\/p\u003e\n\u003cp\u003eMax Coil Bind    \u003cbr\u003e1.190 IN\u003c\/p\u003e\n\u003cp\u003eMax Valve Lift    \u003cbr\u003e0.700 IN\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 300 Series    \u003cbr\u003eR317, R348\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 500 Series    \u003cbr\u003eR517, R552\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Seat    \u003cbr\u003eS114, S115\u003c\/p\u003e\n\u003cp\u003eValve Spring Series    \u003cbr\u003e1300 Series\u003c\/p\u003e\n\u003cp\u003eValve Spring Type    \u003cbr\u003eDual\u003c\/p\u003e\n\u003cp\u003eValve Spring Application    \u003cbr\u003eCircle Track\u003c\/p\u003e\n\u003cp\u003ePrimary Market    \u003cbr\u003eCircle Track|Street Performance\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67723132174649,"sku":"PAC-1371-16","price":385.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/1371.png?v=1792516885"},{"product_id":"pac-1237x-16-0-630-in-id-1-274-in-od-1-800-in-installed-height-0-700-in-max-valve-lift","title":"PAC-1237X-16 0.630 in. ID – 1.274 in. OD – 1.800 in. installed Height – 0.700 in. Max Valve Lift","description":"\u003cp\u003e\u003cspan\u003e0.630 in. ID – 1.274 in. OD – 1.800 in. installed Height – 0.700 in. Max Valve Lift\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePAC Racing’s RPM Series Dual Valve Springs are constructed using our signature PACaloy super clean wire and are heat-treated in-house for precision spring rates and improved strength. They also receive a multi-peen process, polishing, and a Nano-Peen™ proprietary surface treatment for service life optimization. These springs fit GM Gen III\/IV LS engines with specific part numbers for stock heads and aftermarket heads.\u003c\/p\u003e\n\u003cp\u003eBuilt using our signature PACaloy super clean wire to ensure strength and durability\u003cbr\u003eIn-house heat-treating for precise spring rates and increased strength\u003cbr\u003eMulti-peen process to optimize service life\u003cbr\u003ePolishing to improve operating cycles\u003cbr\u003eNano-Peen™ proprietary surface treatment\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eOuter Diameter – Outer Valve Spring    \u003cbr\u003e1.274 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Outer Valve Spring    \u003cbr\u003e0.900 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Inner Valve Spring    \u003cbr\u003e0.630 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Height    \u003cbr\u003e1.800 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Load \/ Height (Valve Closed)    \u003cbr\u003e200 LB @ 1.800 IN\u003c\/p\u003e\n\u003cp\u003eOpen Height    \u003cbr\u003e1.100 IN\u003c\/p\u003e\n\u003cp\u003eOpen Load    \u003cbr\u003e585 PS\u003c\/p\u003e\n\u003cp\u003eOpen Load \/ Height (Valve Open)    \u003cbr\u003e585 LB @ 1.100 IN\u003c\/p\u003e\n\u003cp\u003eValve Spring Rate    \u003cbr\u003e550 PS\u003c\/p\u003e\n\u003cp\u003eMax Coil Bind    \u003cbr\u003e1.045 IN\u003c\/p\u003e\n\u003cp\u003eMax Valve Lift    \u003cbr\u003e0.700 IN\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 400 Series    \u003cbr\u003eR432\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 500 Series    \u003cbr\u003eR532\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 600 Series    \u003cbr\u003eR632\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Seat    \u003cbr\u003eS128, S138\u003c\/p\u003e\n\u003cp\u003eValve Spring Series    \u003cbr\u003eRPM Series\u003c\/p\u003e\n\u003cp\u003eValve Spring Type    \u003cbr\u003eDual\u003c\/p\u003e\n\u003cp\u003ePrimary Market    \u003cbr\u003eCircle Track Drag Race Street Performance\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67723141251385,"sku":"PAC-1237X-16","price":503.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/1237x.png?v=1792517300"},{"product_id":"pac-1209x-16-0-680-in-id-1-324-in-od-1-800-in-installed-height-0-750-in-max-valve-lift","title":"PAC-1209X-16 0.680 in. ID – 1.324 in. OD – 1.800 in. installed Height – 0.750 in. Max Valve Lift","description":"\u003cp\u003e0.680 in. ID – 1.324 in. OD – 1.800 in. installed Height – 0.750 in. Max Valve Lift\u003c\/p\u003e\n\u003cp\u003ePAC Racing’s Street Performance RPM Series Dual Valve Springs are constructed using our signature PACaloy super clean wire and are heat-treated in-house for precision spring rates and improved strength. They also receive a multi-peen process, polishing, and a Nano-Peen™ proprietary surface treatment for service life optimization. Applications include GM Gen III\/IV LS, Ford 2V and 4V Mod Motors, Ford Coyote, Big Block Chevy, Ford 5.4L GT500 \u0026amp; Cobra Jet, Chrysler 6.4L Gen III Hemi, GM Gen IV LS7, and Ford Godzilla 7.3L.\u003c\/p\u003e\n\u003cp\u003eBuilt using our signature PACaloy super clean wire to ensure strength and durability\u003cbr\u003eIn-house heat-treating for precise spring rates and increased strength\u003cbr\u003eMulti-peen process to optimize service life\u003cbr\u003ePolishing to improve operating cycles\u003cbr\u003eNano-Peen™ proprietary surface treatment\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eOuter Diameter – Outer Valve Spring    \u003cbr\u003e1.324 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Outer Valve Spring    \u003cbr\u003e0.950 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Inner Valve Spring    \u003cbr\u003e0.680 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Height    \u003cbr\u003e1.800 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Load \/ Height (Valve Closed)    \u003cbr\u003e160 LB @ 1.800 IN\u003c\/p\u003e\n\u003cp\u003eOpen Height    \u003cbr\u003e1.100 IN\u003c\/p\u003e\n\u003cp\u003eOpen Load    \u003cbr\u003e510 PS\u003c\/p\u003e\n\u003cp\u003eOpen Load \/ Height (Valve Open)    \u003cbr\u003e510 LB @ 1.100 IN\u003c\/p\u003e\n\u003cp\u003eValve Spring Rate    \u003cbr\u003e500 PS\u003c\/p\u003e\n\u003cp\u003eMax Coil Bind    \u003cbr\u003e1.000 IN\u003c\/p\u003e\n\u003cp\u003eMax Valve Lift    \u003cbr\u003e0.750 IN\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 300 Series    \u003cbr\u003eR335\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 400 Series    \u003cbr\u003eR435, R450\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 500 Series    \u003cbr\u003eR550\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 600 Series    \u003cbr\u003eR635, R650\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Seat    \u003cbr\u003eS129, S135, S136\u003c\/p\u003e\n\u003cp\u003eValve Spring Series    \u003cbr\u003eRPM Series\u003c\/p\u003e\n\u003cp\u003eValve Spring Type    \u003cbr\u003eDual\u003c\/p\u003e\n\u003cp\u003ePrimary Market    \u003cbr\u003eCircle Track|Street Performance\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67723186078009,"sku":"PAC-1209X-16","price":402.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/1237x_9a3a960a-f791-4f61-acc5-62faebe6c17c.png?v=1792519004"},{"product_id":"pac-1330-16-0-726-in-id-1-500-in-od-2-050-in-installed-height-0-850-in-max-valve-lift","title":"PAC-1330-16 0.726 in. ID – 1.500 in. OD – 2.050 in. installed Height – 0.850 in. Max Valve Lift","description":"\u003cp\u003e0.726 in. ID – 1.500 in. OD – 2.050 in. installed Height – 0.850 in. Max Valve Lift\u003c\/p\u003e\n\u003cp\u003ePAC Racing’s 1300 Series Drag Race Dual Valve Spring is the manifestation of the latest technology in the drag racing valvetrain aftermarket. Traditional springs were made with higher loads and rates without concern of spring mass and frequency. PAC Racing has taken years of research and coupled that with exotic new heat treatment methods to produce the next generation of drag racing valve springs. The 1300 Series springs feature a 15-30% reduction in physical mass. This, coupled with a natural frequency increase of 20%, enables your engine to rev higher, faster, and last longer even with aggressive camshaft profiles. These springs are constructed of our signature PACaloy super clean wire and are heat-treated in-house for precise spring rates and enhanced strength. They undergo a multi-peen process to optimize service life as well. Unique to the 1300 Series, these springs then receive ID\/OD chamfer finishing, a run through the polisher, and a Nano-Peen™ proprietary surface treatment to improve operating cycles.\u003c\/p\u003e\n\u003cp\u003eBuilt using our signature PACaloy super clean wire to ensure strength and durability\u003cbr\u003eIn-house heat-treating for precise spring rates and increased strength\u003cbr\u003eMulti-peen process to optimize service life\u003cbr\u003eID\/OD chamfer finishing\u003cbr\u003ePolishing to improve operating cycles\u003cbr\u003eNano-Peen™ Proprietary Surface Treatment\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eOuter Diameter – Outer Valve Spring    \u003cbr\u003e1.500 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Outer Valve Spring    \u003cbr\u003e1.050 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Inner Valve Spring    \u003cbr\u003e0.726 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Height    \u003cbr\u003e2.050 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Load    \u003cbr\u003e275 PS\u003c\/p\u003e\n\u003cp\u003eOpen Height    \u003cbr\u003e1.200 IN\u003c\/p\u003e\n\u003cp\u003eOpen Load    \u003cbr\u003e938 PS\u003c\/p\u003e\n\u003cp\u003eOpen Load \/ Height (Valve Open)    \u003cbr\u003e938 LB @ 1.200 IN\u003c\/p\u003e\n\u003cp\u003eValve Spring Rate    \u003cbr\u003e780 PS\u003c\/p\u003e\n\u003cp\u003eMax Coil Bind    \u003cbr\u003e1.130 IN\u003c\/p\u003e\n\u003cp\u003eMax Valve Lift    \u003cbr\u003e0.850 IN\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 400 Series    \u003cbr\u003eR408\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 500 Series    \u003cbr\u003eR508, R509, R544\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 600 Series    \u003cbr\u003eR608, R609, R644\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Seat    \u003cbr\u003eS110, S126, S134\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Cup    \u003cbr\u003eC202\u003c\/p\u003e\n\u003cp\u003eValve Spring Series    \u003cbr\u003e1300 Series\u003c\/p\u003e\n\u003cp\u003eValve Spring Type    \u003cbr\u003eDual\u003c\/p\u003e\n\u003cp\u003eValve Spring Application    \u003cbr\u003eDrag Race\u003c\/p\u003e\n\u003cp\u003ePrimary Market    \u003cbr\u003eDrag Race|Street Performance\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67723197907257,"sku":"PAC-1330-16","price":604.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/1237x_cff3e3fd-94c4-4873-afde-5eed52c4a011.png?v=1792519483"},{"product_id":"pac-1218x-16-top-0-650-in-bottom-0-885-in-id-top-1-055-in-bottom-1-290-in-od-1-800-in-installed-height-0-600-in-max-valve-lift","title":"PAC-1218X-16 Top 0.650 in. \/ Bottom 0.885 in. ID – Top 1.055 in. \/ Bottom 1.290 in. OD – 1.800 in. installed Height – 0.600 in. Max Valve Lift","description":"\u003cp\u003eTop 0.650 in. \/ Bottom 0.885 in. ID – Top 1.055 in. \/ Bottom 1.290 in. OD – 1.800 in. installed Height – 0.600 in. Max Valve Lift\u003c\/p\u003e\n\u003cp\u003ePAC Racing’s 1200 Series Ovate Wire Beehive Valve Springs are a budget-minded spring designed for the rigors of street driving with occasional track days in the mix. This is the perfect spring for your street\/strip terror. Applications include Ford 2V Mod Motor, GM Gen III\/IV LS, Big Block Chevy, Ford 4V Mod Motor, Ford 3V Mod Motor, Chrysler Gen III Hemi, Viper SRT-10, and Small Block Chevy.\u003c\/p\u003e\n\u003cp\u003eBuilt using our signature PACaloy super clean wire to ensure strength and durability\u003cbr\u003eIn-house heat-treating for precise spring rates and increased strength\u003cbr\u003eMulti-peen process to optimize service life\u003cbr\u003ePolishing to improve operating cycles\u003cbr\u003eNano-Peen™ proprietary surface treatment\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eOuter Diameter – Outer Valve Spring    \u003cbr\u003eTop 1.055 IN \/ Bottom 1.290 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Outer Valve Spring    \u003cbr\u003eTop 0.650 IN \/ Bottom 0.885 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Height    \u003cbr\u003e1.800 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Load    \u003cbr\u003e130 PS\u003c\/p\u003e\n\u003cp\u003eInstalled Load \/ Height (Valve Closed)    \u003cbr\u003e130 LB @ 1.800 IN\u003c\/p\u003e\n\u003cp\u003eOpen Load    \u003cbr\u003e318 PS\u003c\/p\u003e\n\u003cp\u003eOpen Load \/ Height (Valve Open)    \u003cbr\u003e318 LB @ 1.200 IN\u003c\/p\u003e\n\u003cp\u003eValve Spring Rate    \u003cbr\u003e313 PS\u003c\/p\u003e\n\u003cp\u003eMax Coil Bind    \u003cbr\u003e1.140 IN\u003c\/p\u003e\n\u003cp\u003eMax Valve Lift    \u003cbr\u003e0.600 IN\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 300 Series    \u003cbr\u003eR310, R311, R363\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 500 Series    \u003cbr\u003eR510, R511\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Seat    \u003cbr\u003eS111\u003c\/p\u003e\n\u003cp\u003eValve Spring Series    \u003cbr\u003eRPM Series\u003c\/p\u003e\n\u003cp\u003eValve Spring Type    \u003cbr\u003eOvate Wire Beehive\u003c\/p\u003e\n\u003cp\u003ePrimary Market    \u003cbr\u003eCircle Track|Street Performance\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67723426234681,"sku":"PAC-1218X-16","price":305.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/1218x.png?v=1792520910"},{"product_id":"pac-1281x-16-valve-springs-1200-series-drag-race-beehive-single-0-551-in-maximum-valve-lift-245-lbs-in-rate-ford-5-0l-modular-v8-set-of-16","title":"PAC-1281X-16 Valve Springs, 1200 Series Drag Race, Beehive, Single, 0.551 in. Maximum Valve Lift, 245 lbs.\/in. Rate, Ford, 5.0L Modular V8, Set of 16","description":"\u003cp\u003eValve Springs, 1200 Series Drag Race, Beehive, Single, 0.551 in. Maximum Valve Lift, 245 lbs.\/in. Rate, Ford, 5.0L Modular V8, Set of 16\u003c\/p\u003e\n\u003cp\u003ePAC Racing’s Street Performance RPM Series Beehive Valve Springs are constructed using our signature PACaloy super clean wire and are heat-treated in-house for precision spring rates and improved strength. They also receive a multi-peen process, polishing, and a Nano-Peen™ proprietary surface treatment for service life optimization.\u003c\/p\u003e\n\u003cp\u003eBuilt using our signature PACaloy super clean wire to ensure strength and durability\u003cbr\u003eIn-house heat-treating for precise spring rates and increased strength\u003cbr\u003eMulti-peen process to optimize service life\u003cbr\u003ePolishing to improve operating cycles\u003cbr\u003eNano-Peen™ proprietary surface treatment\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eOuter Diameter – Outer Valve Spring    \u003cbr\u003eTop 0.849 IN \/ Bottom 1.031 IN\u003c\/p\u003e\n\u003cp\u003eInner Diameter – Outer Valve Spring    \u003cbr\u003eTop 0.527 IN \/ Bottom 0.709 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Height    \u003cbr\u003e1.811 IN\u003c\/p\u003e\n\u003cp\u003eInstalled Load    \u003cbr\u003e80 PS\u003c\/p\u003e\n\u003cp\u003eOpen Height    \u003cbr\u003e1.260 IN\u003c\/p\u003e\n\u003cp\u003eOpen Load    \u003cbr\u003e214 PS\u003c\/p\u003e\n\u003cp\u003eOpen Load \/ Height (Valve Open)    \u003cbr\u003e214 LB @ 1.260 IN\u003c\/p\u003e\n\u003cp\u003eValve Spring Rate    \u003cbr\u003e245 PS\u003c\/p\u003e\n\u003cp\u003eMax Coil Bind    \u003cbr\u003e1.208 IN\u003c\/p\u003e\n\u003cp\u003eMax Valve Lift    \u003cbr\u003e0.551 IN\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 300 Series    \u003cbr\u003eR364\u003c\/p\u003e\n\u003cp\u003eRecommended Valve Spring Retainer – 400 Series    \u003cbr\u003eR464\u003c\/p\u003e\n\u003cp\u003eValve Spring Series    \u003cbr\u003eRPM Series\u003c\/p\u003e\n\u003cp\u003eValve Spring Type    \u003cbr\u003eOvate Wire Beehive\u003c\/p\u003e\n\u003cp\u003ePrimary Market    \u003cbr\u003eStreet Performance\u003c\/p\u003e","brand":"PAC","offers":[{"title":"Default Title","offer_id":67723489149241,"sku":"PAC-1281X-16","price":305.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0102\/9082\/3219\/files\/1218x_7c87aabb-98e7-49b9-abc2-fd18b9ef7de3.png?v=1792521315"},{"product_id":"pac-1575-16-1500-series-dual-valve-springs-spring-od-1-409","title":"PAC-1575-16 1500 Series Dual Valve Springs Spring OD: 1.409","description":"\u003cp\u003e1500 Series Dual Valve Springs Spring OD: 1.409\u003c\/p\u003e\n\u003cp\u003ePac 1500 series valve springs offer an industry leading nitriding process that allows for the material to withstand the abusive wear and fatigue of the typical endurance engine environment. These springs come fully prepared for racing conditions with chamfering, polishing, and the latest surface enhancement technology available. 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