{"product_id":"platinum-660-lift-valve-spring-kit","title":"Platinum .660\" Lift Valve Spring Kit","description":"The Brian Tooley Racing .660\" Lift Platinum Valve Spring Kit (SK001) is engineered for optimal performance in LSx engines utilizing stock rocker arms. This kit provides dual polished springs, available with your choice of lightweight tool steel or titanium retainers.\n\nThe spring specifications include 155 lbs of pressure at 1.780\", 380 lbs at 1.180\", and 400 lbs at 1.130\", with a coil bind limit of 1.070\". This kit is a direct fit for numerous LS engines, including LS1, LS2, LS3, LS4, LS6, L76, L92, L99, LQ4, LQ9, L33, and LSA.\n\nIt is important to note that this kit will not fit LS9 engines. However, it can be used with LS7 engines, provided the proper amount of shim is included, which can be selected during checkout. The steel retainers are among the lightest available for 1.300\" dual springs, weighing 13.9 grams (16.4 grams with locks), while the optional titanium retainers offer an even lighter alternative at 8.5 grams (11 grams with locks). The selection of locators depends on the installed guides in your cylinder heads.","brand":"Brian Tooley Racing","offers":[{"title":"Default Title","offer_id":52689427235128,"sku":"SK001","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687749410.jpg?v=1784906523","url":"https:\/\/store.motormia.co\/products\/platinum-660-lift-valve-spring-kit","provider":"MOTORMIA","version":"1.0","type":"link"}