Description & Size Guide
Kit includes beehive springs; chromoly forged top collars; steel bottom collars; valve keepers and shims. Works with both 7mm and 5/16" valve stems and all S&S SuperStockr heads (5/16") valve stems. Springs are single wire conical (beehive) style springs; manufactured from clean high silicon Kobe alloy wire then micro shot peened and nitrided. 650" valve lift. 1.860" installed height; 178lbs valve seat spring pressure and 376lbs@.650" lift. Maximum 6500 RPM.
84-99 Evo Big Twin; 99-04 Twin Cam; 86-03 XL Sportster (NU)
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