Cosworth High Volume/Pressure Oil Pump Kit

Cosworth’s 12mm Oil Pump for the EJ20 and EJ25 Subaru is designed to increase overall volume, maintain pressure and provide enhanced oil control to aid in the dissipation of heat.

A common problem exists with many high-performance engines, a significant amount of heat is flushed through the engine through the oil system. In order to counter this known issue, Cosworth takes apart an OEM oil pump, de-burrs critical areas to reduce flow restrictions. From there the pump is re-shimmed to increase oil pressure output before finally assembling it with the larger 12mm impeller for increased volume output by 20%.