{"product_id":"btr-660-lift-spring-kit","title":"BTR .660\" Lift Spring Kit","description":"The Brian Tooley Racing Platinum LS Dual Spring Kit is a premier valvetrain upgrade for Gen III and Gen IV LS engines, engineered to keep valves perfectly positioned for applications ranging from daily drivers with mild cams to 600 hp naturally aspirated strokers and 1000 hp turbocharged builds.\n\nThis kit is designed for use with stock rocker arms and is a direct drop-in for 15° LS heads. It can also be used with LS7 heads when a .030” or .045” shim (Part numbers SS030, or SS015 + SS030 respectively) is utilized. The kit includes sixteen SP001-1 dual polished springs, thirty-two VL7°8MM-1 locks, sixteen titanium or chromoly steel retainers, sixteen locators for stock or bronze guides, and sixteen VS LS valve seals.\n\nSpring specifications include 155 lbs of pressure at 1.780\", 380 lbs at 1.180\", and 400 lbs at 1.130\", with coil bind occurring at 1.070\". Note that this kit is not compatible with LS9 engines; for LS9 heads, use part # SK006. If you are using roller rockers, part # SK002 is recommended instead of this kit.","brand":"Brian Tooley Racing","offers":[{"title":"Default Title","offer_id":52687283749176,"sku":"SK001","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660190184.jpg?v=1784882215","url":"https:\/\/store.motormia.co\/products\/btr-660-lift-spring-kit","provider":"MOTORMIA","version":"1.0","type":"link"}