Uses the same gerotor technology that we have used in our dry sump oil pumps for over twenty years. Recommended for use with all tolerance high horsepower engines using any rod combintion including all aluminum rods. Dual-feed Inlet provides superior oil flow. Adjustable by-pass for your specific needs. Mounting boss cross section is 5.7 times larger than a stock pump eliminating vibration and fatigue failures. Supplied with oil pump mounting stud and intermediate shaft. Intermediate shafts are exact sizewith no modification necessary. Moroso Billet Oil Pumps are used on all Doug Herbert