Oil Pump - R4 - Dry Sump - 5 Stage - External - High Volume - Left Side - Universal - Each

R4 Oil Pump 5 Stage

Peterson Fluid Systems is proud to make one of the best performing and most versatile oil pumps available in motorsports. The R4 Oil Pump is the result of more than 50 years of fluid engineering and racing experience. Peterson pioneered the twisted lobe rotor design to deliver solid oil pressure, even in high temperature low viscosity oil set-ups. Its scavenge sections pull serious vacuum too. Peterson provides heavy-weight performance without the heft: shallow depth screw-in fittings, profile machining, and aluminum rotors makes the R4 one of the lightest pumps available. The pump's steel drive shafts are 5/8 in. diameter with a 3/16 in. keyway to receive an appropriately sized pulley or machined with a 3/8 in. male hex for cam or accessory drives. R4 pumps have a rear drive provision which allows for the direct mounting of many popular drive accessories like fuel pumps, vacuum pumps, or power steering pumps with the appropriate adapter. The most decerning engine builders trust the R4 Oil Pump to protect and extend the working life of their engines by having the proper pressure with the proper volume at the right time. Maximizing horsepower with the pump’s ability to create crankcase vacuum as it scavenges and reduces windage in the oil pan. Equally at home on a 5 second drag car, endurance racing at Le Mans, punishing deserts of Baja or even at the local dirt track, Peterson has an R4 oil pump to ensure a first-place finish in any race. Proudly made in the USA, all pumps are machined, assembled, and tested in house, in Longmont, Colorado. Custom configurations are available, contact the Peterson Fluid Systems sales and customer service team for additional options.

Additional Information

Five stage R4 pump. High volume pressure, high volume scavenge, left side mount. 5/8" drive shaft with 3/16” keyway with rear drive

Part Type

Engine Oil Pump

• Additional fittings available to customize for your application
• Includes rear drive so you can attach a fuel pump, vacuum pump, or power steering pump. (With proper adapter, sold seperately)
• Lightweight construction with 6061 T6 aluminum housings and twisted lobe rotors
• Made in USA
• Oil pressure adjustable with built in relief

Important Note Regarding Oils, Additives, Aerosols & Liquids

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Some liquid and aerosol products are restricted for air freight or certain road freight routes and may require alternative transport methods or dispatch from a specific warehouse. While the majority of these items ship without issue, these factors can occasionally affect available shipping options or delivery timeframes.

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Reference Information

Oil Pump, R4, Dry Sump, Five Stage, High Volume, Standard Rotation, Left Side Mount, Rear Drive, Each

Peterson Fluid Systems R4 oil pumps utilize a revolutionary twisted lobe rotor design, allowing for all-aluminum rotors in all sections—saving a huge amount of weight while also increasing performance. Offered in wet and dry sump styles, the pumps are designed with shallow-depth screw-in fittings, creating low-profile modular units that can be outfitted with numerous options to be suited for a variety of applications. Hundreds of models are available; select the options that best suit your application.

Peterson Fluid Systems R4 oil pumps feature:
• 6061-T6 billet aluminum
• CNC-machined for precision
• Unique twisted 4-lobe rotor
• Tab mounting system to save weight
• Low profile for easier mounting
• Wet sump pumps are single stage
• Dry sump pumps are offered in 2 to 8 stages
• Stages refer to total number of pumping bodies including one pressure section