{"product_id":"dual-polished-valve-springs-660-lift","title":"Dual Polished Valve Springs .660\" Lift","description":"The Brian Tooley Racing Platinum LS Dual Spring Kit is a high-performance valvetrain upgrade for Gen III\/Gen IV LS engines. Engineered to maintain precise valve control across a wide range of applications, from mild daily drivers to 1000 hp turbocharged builds, this kit is designed to keep your valves exactly where your camshaft intends them to be.\n\nThis is a drop-in kit suitable for 15° LS heads and typically works with LS7 heads when utilizing a .030” shim (Part # SS030). The kit includes sixteen SP001-1 dual polished springs, 32 VL7°8MM-1 locks, 16 retainers (available in Titanium or chromoly steel), 16 locators for stock or bronze guides, and 16 VS LS valve seals. Spring specifications include 155 lbs at 1.780\", 380 lbs at 1.180\", 400 lbs at 1.130\", and a coil bind at 1.070\".\n\nFor builds utilizing roller rockers, an alternative kit (Part # SK002) is recommended. This kit is not compatible with LS9 engines; for LS9 heads, please refer to Part # SK006.","brand":"Brian Tooley","offers":[{"title":"Default Title","offer_id":52687291154744,"sku":"SP001\/SK001","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660683000.png?v=1784882313","url":"https:\/\/store.motormia.co\/products\/dual-polished-valve-springs-660-lift","provider":"MOTORMIA","version":"1.0","type":"link"}