V-Twin Mfg. Inner Primary Housing Assembly Natural V-Twin Manufacturing offers some of the best replacement parts at the right price point. This Inner Primary housing assembly for 4 speed models is just that. Features: Includes inner cover with hole for mid shift control level, OEM bearing, seal, chain tensioner, detent plate, vent tube, chain oil tube and drain plug Cover accepts 8 or 9 hole outer primary covers Cast finish as original, without clear coating