RBS stocks a large selection of magneto drive parts to fit most all racers needs. This is a bronze drive gear to be used with most SBC/BBC mag drives.
MSD drives use the .500" shaft and drilled to accept the steel roll pin.
Dunn/FIE/Mallory/Vertex drives use the .491" shaft and drilled to accept the steel roll pin.
Dunn/FIE/Mallory/Vertex drives use the .491" shaft and drilled to accept the steel roll pin. Gear is machined with a 5/16" .312" hex to drive a Titan oil pump.
Racer can choose from pull down menu which gear they need and each gear comes with a new steel roll pin.
Racer should measure their mag shaft to make sure on the measurement before ordering.