9/16" ID pinion bushing. 8 ribs w/o stock outside oiler passage. 5/16" gen. mount holes. Use tapped hole on top of the cover to supply oil to the top end, similar to 36-48 OHV B.T. Cast 356-T6 extra strong aluminum cam covers in the same burnished finish as S&S crankcases. CNC precision machined to offer close tolerances. Improves crankcase ventilation and oil-air mist separation via a larger, redesigned baffle chamber. Bushings are installed and reamed to factory specifications. Note 1: Kit includes a gear cover gasket & hardware. Note 2: Will not fit Side Valve models.