In some endurance uses and most oval track applications, it is necessary to use a rev kit for the lifter to precisely follow the profile of the cam. This safety measure ensures that in the event of pushrod or rocker arm failure, the lifter will not come out of the lifter bore. This could cause a loss of oil pressure and subsequent engine failure. * Constructed from the toughest extruded aluminum (except Big Block Chevrolet, which is a casting) * Kit comes with all necessary springs and buttons * Notched to fit the block & should require no machine work * Angle of the spring pocket in the bar has been changed to duplicate the lifter angle in the block PartNumber : cca4000-P Description : Rocker Arm Rev Plate; For Use w/Rocker Arm Rev Kit Part # 4000/4008; Title : 4000-P Plate, for CS Rev Kit California Proposition 65 : WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Uncategorized::Uncategorized