{"product_id":"660-lift-dual-platinum-spring-kit","title":".660\" Lift Dual Platinum Spring Kit","description":"The BTR Platinum .660\" Lift Dual Spring Kit (SK001) is engineered for LS engines, specifically designed for use with stock rocker arms. This comprehensive kit includes all necessary components for a valvetrain upgrade: 16 SP001-1 dual polished springs, 32 VL7°8MM-1 locks, 16 retainers (available in either Titanium or chromoly steel), 16 locators compatible with stock or bronze guides, and 16 VS LS valve seals.\n\nThe spring specifications include 155 lbs of seat pressure at 1.780\", 380 lbs of open pressure at 1.180\", and 400 lbs at 1.130\". The coil bind is rated at 1.070\".\n\nThis kit is a direct fit for all 15-degree LS heads, including common variants such as LS1, LS2, LS3, LS4, LS6, L76, L92, L99, LQ4, LQ9, L33, and LSA engines. It can also be fitted to LS7 heads with the addition of approximately .045\" of spring shim, using part numbers SS015 and SS030. However, this kit will not fit LS9 engines; for those applications, part # SK006 is recommended.","brand":"BTR","offers":[{"title":"Default Title","offer_id":52687301214520,"sku":"SK001","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660683122.jpg?v=1784882373","url":"https:\/\/store.motormia.co\/products\/660-lift-dual-platinum-spring-kit","provider":"MOTORMIA","version":"1.0","type":"link"}