If you are looking for something better than stock Evolution or Twin Cam style rocker arms, this is it! An economical solution for stock rebuilds, and mild performance upgrades. Forged from 4140 steel for greater strength than stock or cast steel rocker arms. In addition they feature the same .750“ long rocker shaft bushings as our S&S roller rockers do, for 50% more load bearing area than in stock and other aftermarket rocker arms. The valve contact tips are induction hardened for extended durability. Thousands of hours of engine testing have proved them to be superior to any non-roller rocker arm on the market. Recommended for cams of .585“ lift or less.