Fits 1989 to 1998.5 12 Valve Cummins engine with stock gear housing. Billet gear housing cover requires factory gasket (not included), can use factory fan with stock dampener and belt. Includes Stainless Steel hardware. Allows installation of aftermarket mechanical fuel supply pump, features slotted access cover for use with adjustable cam timing gear. Includes crank seal ring (does not include crank seal). Custom engraving available for additional charge, call for pricing.Photo shown with Waterman aux pump which sell separately.