Oil Pump 1 Stage L/S w/ Rear Drive & Vacumn

The Peterson Fluid Oil Pump 1 Stage L/S with Rear Drive & Vacuum (part number 04-1804) is a high-volume, externally mounted wet sump oil pump engineered for engine builders and performance enthusiasts who demand reliable circulation in custom and race applications. This single-stage pump delivers consistent flow at 1.200 inches of pressure, making it suitable for engines requiring external lubrication management without complex internal modifications.

The left-side mounting configuration provides flexibility in engine bay layouts, while the rear-drive design allows the pump to be powered directly from the crankshaft or via belt drive depending on your installation method. The integrated vacuum feature helps manage crankcase pressure, a critical function in high-revving or forced-induction builds where blow-by accumulation can compromise seal integrity and engine performance. Peterson Fluid's reputation for precision manufacturing means this pump tolerates the demands of sustained high-RPM operation and temperature cycling typical in race environments.

This pump is designed for builders working on custom engine swaps, high-performance street vehicles, and dedicated race applications where factory pump capacity or routing is inadequate. It serves builders who need a universal solution that doesn't require engine-specific casting modifications. The external mounting eliminates concerns about internal pump wear affecting bearing clearance, and the vacuum function reduces parasitic drag from excessive crankcase pressure—both factors that preserve engine longevity in demanding use.

Peterson Fluid pumps are industry standards in circle track racing, off-road competition, and street performance builds where dependable oil flow under sustained load separates functional engines from failures. The 04-1804 model bridges the gap between basic circulation and advanced pressure management for builders who refuse to compromise.