S&S Cycle High Performance Valve Spring Kit EVO VALVE SPRING.630 LIFT Features a triple spring configuration that can be used with stock length valves Kit includes springs, upper and lower collars and keys Can be used with cams with lift up to .640" Spring pressures are 170 lb. when closed, 390 lb. at .560" lift and 415 lb. at .640" lift Fits: 84-04 Big Twin, 86-03 XL, 95-02 Buell