{"title":"Engine Valve Spring","description":null,"products":[{"product_id":"2001-2016-gm-6-6l-duramax-valve-springs-retainers-and-keepers-complete-kit","title":"2001-2016 GM 6.6L Duramax Valve Springs, Retainers, and Keepers Complete Kit 110090050","description":"\u003cp\u003eThe valve spring, spring seat\/retainer\/keeper kit comes installed with each PPE Duramax Cast Iron Cylinder head. The tapered valve springs' higher spring rate and lighter valve train weight enable faster response during higher RPMs and eliminate valve float. Premium chromoly material construction ensures the longevity and durability of valve seats, retainers, and keepers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e32 springs\u003c\/li\u003e\n\u003cli\u003e32 spring retainers\u003c\/li\u003e\n\u003cli\u003e32 spring seats\u003c\/li\u003e\n\u003cli\u003e32 sets of keepers\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE Diesel","offers":[{"title":"Default Title","offer_id":48478552686869,"sku":"HFTD_110090050","price":539.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0845\/6844\/1109\/files\/110090050-HFTD.jpg?v=1723664599"},{"product_id":"2001-2016-gm-6-6l-duramax-valve-and-spring-kit-ppe-performance","title":"2001-2016 GM 6.6L Duramax Valve and Spring Kit PPE Performance 110090080","description":"\u003cp\u003eThe intake\/exhaust valve, valve seal, spring, spring seat\/retainer\/keeper kit comes standard with each PPE Duramax Cast Iron Cylinder head. This kit is specially designed for the GM 6.6L Duramax and contains the components for both driver and passenger side cylinder heads. The valves are fully nitridated and reinforced for superior durability and reliability.\u003c\/p\u003e\u003cp\u003eThe tapered valve springs' higher spring rate and lighter valve train weight enable faster response during high RPMs and eliminate valve float. Springs rated to 126 lbs at installed height and can handle 60+ lbs of boost. 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Our springs are manufactured from super clean Hi-Tensile Chrome Silicon steel with a proprietary multi-step heat treating process that minimizes load loss.\u003c\/p\u003e\u003cp\u003eThese springs have a seat pressure of 105 lbs with an open pressure of 195 lbs at maximum lift. The retainers are thru-hardened 4140 chome moly steel and have a black oxide finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eCummins 24V Spring and Retainer Set\u003c\/li\u003e\u003c\/ul\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":48955047706901,"sku":"FQWW_FPE-34797","price":524.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0845\/6844\/1109\/files\/FPE-34797-FQWW.jpg?v=1755121585"},{"product_id":"performance-valve-springs-and-retainer-kit","title":"Performance Valve Springs and Retainer Kit","description":"\u003cp\u003eThe XDP Performance Valve Springs and Retainer Kit XD386 are a perfect upgrade for your modified 2001-2016 GM 6.6L Duramax. Camshaft upgrades and other modifications that increase boost require more valve control.\u003c\/p\u003e\u003cp\u003eThe XDP Performance Valve Spring feature a conical design for better valve control than a standard straight spring. The conical design also allows for smaller and lighter spring retainers. Each spring undergoes a stress relief process and is computer load mapped, to ensure quality and long-term reliability.\u003c\/p\u003e\u003cp\u003eEach spring is matched within 1 lb of seat pressure to ensure consistency. Sold as a complete set with valve springs, retainers, and locks. Each kit is backed by XDP's 1-year unlimited mileage warranty.\u003cbr\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e125 Lb. 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These valve springs deliver improved valve control over a factory valve spring with increased spring pressure to minimize valve float.\u003c\/p\u003e\u003cp\u003eEach spring endures a stress relief process and is computer load mapped to provide a high-quality product with long-term durability. Tested within 1 lb of seat pressure, the XD388 comes as a complete set and includes XDP's 1-year unlimited mileage warranty. Valve springs only, this set re-uses your factory retainers and locks.\u003cbr\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of 32 Springs\u003c\/li\u003e\n\u003cli\u003e100 Lb. 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Valve springs are a vital upgrade that are often ignored in many performance builds.\u003c\/p\u003e\u003cp\u003eThe stock valve springs in your Cummins engine are not designed to handle the increased engine RPM or higher boost levels that are common in modified applications.\u003c\/p\u003e\u003cp\u003eEven typical upgrades like an exhaust brake, aftermarket turbocharger, fuel plate, and injectors can trigger valve float that may result in catastrophic engine damage. In addition, your valves can be pushed open by boost and drive pressure causing reversion.\u003c\/p\u003e\u003cp\u003eReversion is when exhaust gasses flow back into the cylinder on the intake stroke, hindering your engine performance. These potential issues are the reason upgraded valve springs are essential on modified engines!\u003c\/p\u003e\u003cp\u003eThe XDP Performance Valve Springs and Retainer Kit XD389 features a conical design that offers improved valve control over a basic straight spring. The conical shape allows for a smaller and lighter weight spring retainer that is more robust due to the reduction in size. Unlike other aftermarket valve springs, the XD313 Valve Spring Kit can be used on a wide range of applications, from stock all the way up to race-built engines.\u003c\/p\u003e\u003cp\u003eThis makes these springs a perfect option for a one-and-done upgrade that lets you upgrade your engine to support more power in the future. 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The XD390 Valve Spring Kit is designed to help eliminate valve float due to elevated cylinder pressures and higher boost levels.\u003c\/p\u003e\u003cp\u003eCommon upgrades like aftermarket tuning and fueling and turbo upgrades can cause valve float that results in severe engine damage. Intake valves can also be blown open from added boost levels and exhaust drive pressure which allows reversion. Reversion is when exhaust gasses enter cylinder on the intake stroke, another condition that can hurt your power potential.\u003c\/p\u003e\u003cp\u003eThe XD390 Valve Spring Set is ideal for the enthusiast that is running an aftermarket camshaft, upgraded or compound turbochargers, and fueling upgrades. These springs are ready to install using your factory retainers and locks. 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Valve springs are an essential upgrade that are often overlooked in many performance builds.\u003c\/p\u003e\u003cp\u003eThe factory valve springs in your engine are not intended to handle the increased engine RPM and elevated boost levels that are typical in modified applications. Even common upgrades like an aftermarket turbocharger and performance tuning can cause valve float that may result in serious engine damage. In addition, your valves can be blown open by boost and drive pressure causing reversion.\u003c\/p\u003e\u003cp\u003eReversion is when exhaust gasses flow backwards and enter the cylinder on the intake stroke, hurting your engine performance. This is why upgraded valve springs are a must-have on modified engines! \u003c\/p\u003e\u003cp\u003eThe XDP XD313 Valve Springs feature a conical design that provides more valve control than a standard straight spring. The conical shape allows for a smaller and lighter spring retainer that is also stronger due to size reduction. 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