Oil Pump Fitting R4 20AN

The Oil Pump Fitting R4 20AN from Peterson Fluid is a precision-engineered adapter designed for serious engine builders and high-performance automotive enthusiasts who demand reliable oil circulation in modified and racing applications. This male 20 AN fitting serves as the critical connection point between your R4 oil pump and custom high-flow oil lines, enabling you to route pressurized oil exactly where your engine design requires it. Whether you're assembling a street performance build, competition engine, or custom cooling system, this fitting ensures leak-free connections under demanding operating conditions.

Manufactured from lightweight aluminum and finished in black anodizing, the Oil Pump Fitting R4 20AN resists corrosion while maintaining a clean engine bay aesthetic. The 20 AN thread size—equivalent to -20 JIC or SAE standard—delivers a 1.25-inch 16 TPI connection thread that accommodates high-pressure hose fittings rated for aggressive oil delivery systems common in LS, small-block, and big-block engine swaps. The compact 2.3 x 2.1 x 3.8-inch profile integrates seamlessly into tight engine compartments, while the anodized finish protects against oxidation and wear during repeated installation and maintenance cycles. Peterson Fluid's R4 pump series is purpose-built for forced induction and nitrous applications, making this fitting essential for systems operating at elevated pressures.

This fitting is ideal for builders installing Peterson R4 oil pumps in custom engine builds, supercharged platforms, or fuel-system upgrades requiring dedicated line routing. Compatibility extends to any project specifying 20 AN male connections—common in fuel systems, oil cooler circuits, and auxiliary cooling loops. Installation requires appropriate 20 AN hose with JIC flare ends or push-lock adapters; ensure hose ratings match your system pressure to prevent catastrophic failure. Weighing just 0.13 lbs, the aluminum construction minimizes parasitic weight while the black anodized finish matches modern engine bay aesthetics and resists thermal stress from underhood environments.