Filter your oil before it enters your motor Complete with fittings that send oil to the filter before pumping it through your engine Allows the use of 10-micron oil filters for additional protection Machined from 6061 T-6 aluminum billet and polished to a mirror finish Patented three-valve system delivers oil to the crankshaft at idle Stainless steel check-valve eliminates wet-sumping upon startup; positively will not leak oil into lower end during storage No provisions for primary or rear-chain oiling Replacement gasket kits include cover gasket, body gasket, snap rings and keys U.S. Patent #6,230,680. OIL PUMP ASSY 92-99BT