The Peterson Fluid Systems R4 five-stage oil pump is a versatile motorsports pump using twisted lobe rotors to sustain oil pressure even with high-temperature, low-viscosity oils. Its modular, low-profile layout includes internal scavenge sections that pull crankcase vacuum to reduce windage. This cam-drive rear-drive configuration offers flexible drive options for race engines and is built to support accessory mounting when combined with rear-drive adapters.
Peterson Fluid Systems R4 5-Stage Oil Pump - Cam Drive Rear Drive