Modified Oil Pump 10/11/12MM



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SKU: FREN226 FREN227 FREN228 Category:

The Heart of Your Engine

This effective modification has been designed to assist the EJ Engine with it’s oil supply and is now regarded as a must have modification with any Subaru EJ engine build.

Each pump is carefully checked and modified to incorporate a different pressure relief valve ensuring greater reliability and peace of mind to your Subaru EJ engine.

Additional information

Weight 1 kg
Dimensions 25 × 15 × 17 cm

Improving Perfection

Each relief  valve is EN40B Nitride hardened and machined to the correct size

Then the relief valve receives a 14 hour super finish polishing treatment to make them as smooth as possible.

Each relief valve has a finishing surface of 0.03 RA

Each pump is modified here at the Fuji headquarters and primed with oil just before dispatch


Available Sizes

10mm Rotor – Standard Fitment for many Subaru models
11mm Rotor – Suited for 90% of modified applications – increased volume over the 10mm to help with oil pressure in the low down RPM range
12mm Rotor – Only recommended for cars running larger sumps, external oil coolers, shimming of the relief valve may be needed depending on application.

Model Application:

Suitable for the following models:

  • All Subaru EJ Engines

If you are unsure of fitment or application then please contact us with your vehicles chassis number.

What's in the kit:



  • 1 x Subaru Oil Pump
  • 1 x FR Modified relief valve
  • Subaru Front Crankshaft Oil Seal
  • Subaru Rear block O-Ring
  • Subaru 7 x Mounting Bolts