Fits 12 Valve Cummins engine with stock gear housing. Requires factory gasket (not included), can use factory fan with stock 12 valve dampener and belt. Now designed to use stock rpm sensor pickup using stock bracket and stock bolts for sensor (see picture). Includes Stainless Steel hardware for all other bolts. Allows installation of aftermarket mechanical fuel supply pump. Includes crank seal adapter ring (does not include crank seal). Custom engraving also available for additional charge, call for pricing. Pictures shown with Waterman aux pump which sells separately. Comes with block off for when not using Waterman fuel pump. Does not fit first gen trucks (1993 and earlier) fits 1994 and up 12v engines. Choose between machined aluminum and black anodized finish.