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At the heart of all Roger Clark Motorsport engines is the now world renowned RCMS Modified oil pump.
This clever, effective modification has been designed to correct a very common issue with the EJ series of engines oil supply and is now regarded as a must have modification with any WRX or STI engine build. Each pump is carefully checked, given a serial number and then modified by Roger Clark Motorsports to incorporate a different pressure relief valve ensuring greater reliability and peace of mind to your WRX or STI engine.
This variant of oil pump is fitted with the larger 11mm Rotor meaning a higher oil pressure is produced, perfect for modified engines where components require superior lubrication.
Also included with the RCM modified oil pump is the front crank oil seal, rear gallery oil seal and (x)7 bolts for securing the pump to the engine block.
FEATURES
- Improved reliability
- Increased oil pressure over the standard 10mm oil pump
- Carefully Inspected and primed with oil prior to dispatch
TECHNICAL SPECIFICATIONS
- Modified with a billet, super finish, nitrided replacement plunger
- 11mm Internal drive rotor
- Serial numbered
- Primed with oil prior to dispatch
OIL PUMP BUYERS GUIDE
CAN'T GET YOUR OIL TO PRIME?
OIL PUMPS, OIL PRESSURE, & SHIMMING SUBARU OIL PUMPS
| Model | Fitment Confirmation |
|---|---|
| EJ205 | ā |
| EJ207 | ā |
| EJ255 | ā |
| EJ257 | ā |
WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.
| SKU | SEN1065 |
|---|---|
| Manufacturer's Part Number | SEN1065 |
| Brand | Roger Clark Motorsport |









