Made from Cast Iron, precision machined for maximum performance and distortion free fit. This Heavy Duty pump provides increased oil pressure, flow and volume. Packaged with our matching EMPI Steel Cover with a 3/8" NPT threaded boss, 8mm Allen Head Cap Screw Bolts and gaskets. Pump is Full-Flow Ready, without an exit passage port. No need to thread the Oil Pump! To be used with Full-Flow Pump Cover ONLY.