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The Peterson R4 four‑stage oil pump applies the twisted‑lobe rotor design to produce reliable pressure and multiple scavenge stages with minimal weight and low profile. Internal scavenge manifolds and shallow fittings make it modular and easy to package, while scavenge sections help reduce crankcase windage. This left‑side mount standard‑volume pump includes a 5/8" drive shaft with 3/16" keyway and rear‑drive provision.
Peterson Fluid Systems R4 4-Stage Oil Pump - Left Side Mount - Rear Drive
