Pioneer mag drive gear. This gear is made from billet steel and is black oxide finish. Mag drive gear includes a .375" female fuel pump hex to drive a fuel pump with and a place to mount thrust bearings and shims to set the camshaft end play. Specify for a SBC, BBC, or KB Olds when ordering. Bearing and shim kits as well as mounting studs and nuts are available separate if the racer chooses to order them.
Distance from camshaft surface to thrust bearing surface on a SBC/BBC gear is 2.190", on a Olds 1.890".