{"product_id":"650-lift-dual-valve-spring-kit","title":".650\" Lift Dual Valve Spring Kit","description":"The Brian Tooley Racing Max Pressure Gen 2 LT\/SBC Dual Spring Kit (SK004S) is specifically engineered for Small Block Chevy engines that utilize roller rockers. Building upon the design principles of the Platinum Spring Kit, this kit addresses the increased valvetrain demands imposed by the additional weight of roller rockers, requiring a higher spring rate for optimal stability.\n\nThis comprehensive kit includes all necessary components for installation: sixteen .650” lift BTR Max Pressure Dual Valve Springs (SP010-1), a BTR Steel Retainer Set (SR004S-16), BTR Spring Locators with a .505\" ID and .060\" thickness (SL505060-16), a BTR Valve Seal Kit (VS500341-16), and a Valve Lock Set (CC648-16).\n\nThe dual valve springs are rated at 170 lbs of pressure at 1.800 inches installed height and 450 lbs at 1.115 inches, with a coil bind occurring at 1.000 inches. They feature a spring rate of 408 lbs. It is crucial for buyers to measure their valve guides before purchase to ensure compatibility.\n\nThis kit is noted to be compatible with Gen 2 LT\/SBC engines and applications using roller rockers. Some sources indicate a fitment for 1997-2004 Chevrolet Corvette C5 models. A previous iteration of a similar kit, the SK001, explicitly stated it would not fit LS9 engines, though this specific exclusion is not directly stated for the SK004S, caution is advised for LS9 applications.","brand":"Brian Tooley Racing","offers":[{"title":"Default Title","offer_id":52687297904952,"sku":"SK004S","price":519.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660190408.jpg?v=1784882335","url":"https:\/\/store.motormia.co\/products\/650-lift-dual-valve-spring-kit","provider":"MOTORMIA","version":"1.0","type":"link"}