Rocker Shaft Kit High Performance High StrengthRocker Shaft Kit High Performance High Strength Increase the RPM potential of your engine and get more power EMPI's rocker shaft kits help to eliminate rocker shaft side play that causes rocker arm galling, clip and washer failure Features a floating aluminum center spacer which allows for fine tuning of rocker arm geometry and positioning All necessary hardware is included Best when used with EMPI's swivel foot adjusters