Fits: 1940-'47 Over Head Valve. Knuckle head series. 8 Ribs, w/tapped hole for top end oiling ,
5/16" gen mount holes. S&S® Pinion bushing I.D. 9/16". - Natural Finish
Cast generator gearcovers come with countersunk hardware.
*A tapped hole on top of the cover can be used to supply oil to the top end – similar to 1936-48 OHV big twins