{"product_id":"xdp-xdp-performance-valve-springs-retainer-kit-66l-duramax-2001-2016","title":"XDP Performance Valve Springs \u0026 Retainer Kit - 6.6L Duramax","description":"\u003cdiv class=\"product-overview\"\u003e\n\u003ch1 style=\"text-align: center;\"\u003e\u003cstrong\u003ePerformance Valve Springs \u0026amp; Retainer Kit\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2\u003e\u003cstrong\u003eFeatures \u0026amp; Details:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e125 Lb. Seat Pressure\u003c\/li\u003e\n\u003cli\u003eConical Spring Design\u003c\/li\u003e\n\u003cli\u003ePerformance Valve Spring Kit\u003c\/li\u003e\n\u003cli\u003eEssential For Elevated Boost Levels\u003c\/li\u003e\n\u003cli\u003eComplete Set (Springs, Locks Retainers)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2 Year \/ Unlimited Mileage\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe XDP Performance Valve Springs \u0026amp; 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. The XDP Performance Valve Spring features 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. Each 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 \u003cstrong\u003e2 Year \/ Unlimited Mileage\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"XDP","offers":[{"title":"Default Title","offer_id":52303734538471,"sku":"XD386","price":696.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/4030\/4871\/files\/XD386_XDP_1_63f7b69823832.webp?v=1783902966","url":"https:\/\/www.bsdp.store\/products\/xdp-xdp-performance-valve-springs-retainer-kit-66l-duramax-2001-2016","provider":"Black Sheep Diesel Performance","version":"1.0","type":"link"}