{"product_id":"btr-max-pressure-gen-2-lt-sbc-dual-spring-kit-650-lift-with-steel-retainers-565-valve-guides-for-roller-rockers-sk004s","title":"BTR Max Pressure GEN 2 LT\/SBC Dual Spring Kit - .650\" Lift with Steel Retainers - .565\" Valve Guides - for Roller Rockers - Sk004s","description":"\u003cp\u003eBTR MAX PRESSURE GEN 2 LT\/SBC DUAL SPRING KIT - .650\" LIFT - FOR ROLLER ROCKERS - STEEL RETAINERS - SK004\/S\/6560\u003cbr\u003e\nBTR’s Max Pressure Spring Kit applies what we learned when designing the Platinum Spring Kit (SK001) and applies it to applications utilizing roller rockers. Due to the additional weight of roller rockers, a higher spring rate is needed to retain valvetrain stability. Whether you’re putting together a daily driver with a mild cam, a 600 hp N\/A stroker, or a turbocharged 1000 hp brawler, our Platinum Spring Kit will make sure your valves are right where your cam wants them to be at all times.\u003cbr\u003e\nKit includes:\u003cbr\u003e\n• SP010-1 - .650” lift BTR Max Pressure Dual Valve Springs (16)\u003cbr\u003e\n• SR004S-16 - BTR Steel Retainer Set For Max Pressure Springs\u003cbr\u003e\n• SL565060-16 - BTR Spring Locator Set; .565\" ID, .060\" Thick\u003cbr\u003e\n• VS500341-16 - BTR Valve Seal Kit\u003cbr\u003e\n• CC648-16 - Valve Lock Set\u003cbr\u003e\nSpring specs:\u003cbr\u003e\n170 lbs @ 1.800”\u003cbr\u003e\n380 lbs @ 1.180\"\u003cbr\u003e\n450 lbs @ 1.115”\u003cbr\u003e\nCoil bind @ 1.000”\u003cbr\u003e\nMEASURE YOUR VALVE GUIDES BEFORE PURCHASE!\u003c\/p\u003e","brand":"Brian Tooley Racing","offers":[{"title":"Default Title","offer_id":52041483616550,"sku":"SK004\/S\/6560","price":519.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/1666\/1542\/files\/sk004_s.jpg?v=1770812990","url":"https:\/\/billysspeedshop.com\/fr\/products\/btr-max-pressure-gen-2-lt-sbc-dual-spring-kit-650-lift-with-steel-retainers-565-valve-guides-for-roller-rockers-sk004s","provider":"Billys Speed Shop","version":"1.0","type":"link"}