Roller rocker arms that were designed for superior strength to eliminate the failure-prone stress areas and to reach higher rpm with reduced side thrusting. S&S roller rockers are forged from 4140 steel, heat-treated, and then shot-peened for additional strength and protection from fatigue. Rocker ratio is exactly 1,5:1. They feature 3/4” long bronze bushings which provide 50% more load bearing surface for improved longevity. Additional roller tip oiling can be achieved with S&S Quickee pushrods and lifter blocks. Each kit includes 2 front and rear rocker arms. Shafts have to be ordered separately, existing stock shafts can be retained.