This inner primary case permanent mold is cast from A356-T6 high grade aluminum for superior strength and CNC machined for exact fit. These high strength cases are thicker through the middle for added durability between the motor and transmission. These cases come with the main bearing and seal, the starter shaft oil seal, the starter shaft bushing, and the chain adjuster installed.

Note: All Delkron inner primaries come with an upgraded sealed main-shaft bearing. This bearing fits directly on the main-shaft and will require the stock spacer to be removed before installation.