Forged from 8620 steel, heat-treated, and then shot-peened for additional strength and protection from fatigue, these roller rocker arms were designed to eliminate failure-prone stress areas found in some other rockers. Most rockers come equipped with 1/2" long bushings or needle bearings, however these utilize 50% longer 3/4" long bronze bushings. The end result is claimed by S&S to be the finest rocker arm available anywhere. It is highly recommended to install these roller rocker arms with new shafts. The use of adjustable push rods is a must.
