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The Peterson R4 four‑stage oil pump applies the twisted‑lobe rotor design with aluminum housings and shallow fittings to combine strong oil pressure, effective scavenging and a low profile for tight engine bays. This left‑side mount drag variant delivers 1.2" pressure and 1.4" scavenge and features a 3/8" male hex drive shaft plus rear‑drive provision for adding accessories with the appropriate adapters.
Peterson Fluid Systems R4 4-Stage Oil Pump - Left Side Mount - Rear Drive Drag
