S&amp,S Cycle S&S Cycle Roller Rocker Arm Set 900-4065A Forged steel roller rocker arms were designed for superior strength Forged from 8620 steel, heat-treated and then shot peened for additional strength and protection from fatigue 3/4in. long bronze bushings Features a modified lubrication system with unrestricted roller oiling Includes 2 front and rear rocker arms