BTR .660" PLATINUM DUAL SPRINGS - SP001-16

THESE ARE FOR STOCK ROCKERS .660" Lift Dual Polished Springs, these are a perfect upgrade to standard "Gold" springs and fit most aftermarket LS spring components.  Spring specs are 155 lbs @ 1.780", 380 lbs @ 1.180", 400 lbs @ 1.130, coil bind @ 1.070", set of 16. Matching retainers, locators and seals MUST be used with dual springs. Failure to use the required components can result in engine failure! SP001/SK001 springs are designed for use with stock rockers.   Heavier roller rockers require more spring pressure to maintain control of the valve train.   We recommend BTR part number SP002/SK002 for roller rocker applications. . Part Number SP001-16 Part Type Valve Springs Brand Brian Tooley Racing Engine Type Gen III/IV Max Lift .660 Style Dual Quantity Set of 16 (Springs Only)   *Item ships directly from Brian Tooley Racing.