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The Peterson R4 four-stage oil pump in left-side mount with rear drive and reverse rotation is engineered for serious scavenging and reliable pressure. The twisted‑lobe rotor design enables lightweight aluminum rotors while sustaining robust flow in high‑temperature, low‑viscosity conditions. A compact internal scavenge manifold and low‑profile fittings keep the pump slim for tight engine installations, and the rear drive allows accessory attachment with the right adapter.
Peterson Fluid Systems R4 4-Stage Oil Pump - Left Side Mount - Rear Drive - Reserve Rotation Drag
