Machined from 4140 forged steel and heat treated for maximum strength Feature the exclusive .750" long S&S rocker arm bushing which provides 50% more load bearing surface than stock .500" bushings Can be oiled through pushrods when used with S&S Shovelhead-style tappet guides and pushrods Compatible with stock and S&S billet Shovelhead-style rocker boxes Some clearancing may be required when using stock rocker boxes Set includes two each front and rear rocker arms Made in the U.S.A.. ROCKER ARMS 1.725 84-17