The Peterson Fluid Systems R4 high-volume one-stage oil pump, left-side mount with rear drive, builds on a twisted lobe rotor design to deliver elevated flow and reliable pressure in high-demand engines. Features lightweight components and shallow fittings for a compact profile, plus a 5/8-inch drive shaft with 3/16-inch keyway; the rear drive provision supports mounting of accessories with the correct adapter.
Peterson Fluid Systems R4 1-Stage Oil Pump - Left Side Mount - HV - Rear Drive