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IAG Performance Stage 2 Oil Pump Stage 2 CNC Ported EJ20/EJ25 Oil Pump

Engine Oil Pump


IAG Stage 2 CNC Ported Oil Pump for EJ20/EJ25

  • 11mm Oil Pump Rotors
  • Blueprinted and Assembled, Ships Ready to Install
  • CNC Ported to Maximize Flow and Pressure
  • Intended for Stock Engines or Stage 1 IAG Engines.
  • Shimmed and REM Polished Pressure Relief Valve to Increase Oil Pressure
Pricing: $449.99

Free ground shipping on all order over $100.00 (some exclusions may apply)


Subaru: WRX STI 13 - 21 Sport-tech / Tsurugi Edition / Launch Edition / Sport / Base / Limited / Series.HyperBlue / Kanrai Edition / STI / Type RA / S209, Subaru: Legacy 05 - 09 GT spec.B / GT Limited / GT, Subaru: Impreza 02 - 14 WRX STI Special Edition / WRX SE / WRX GT / WRX Premium / 2.5 GT / WRX STI Limited / WRX / WRX STI / WRX Limited / WRX TR, Subaru: Baja 04 - 06 Turbo, Subaru: Outback 05 - 09 2.5 XT / XT Limited / XT, Subaru: Forester 04 - 13 XT Sports / Sports 2.5 XT / XT / XT Premium / XT Limited / XT Touring / 2.5 XT, Subaru: WRX 12 - 16 Limited / Base / STI, Saab: 9-2X 05 - 06 Aero

Kit Includes: (x1) 11 mm Blueprinted Oil Pump, (x7) Oil Pump Bolts, (x1) Crankshaft Seal, (x1) Oil Pump O-Ring

  • Each IAG Stage 2 oil pump starts life as an OEM spec 11mm oil pump, straight from Subaru. IAG completely disassembles the new oil pump including pulling the rotors, backing plate & pressure relief valve. Next, the main body is fixtured in our in-house 5-Axis Centroid CNC machine where the inlet and outlet passageways are CNC ported. This allows for a larger, more consistent pathway for the oil into and out of the gerotor internals and helps to prevent cavitation. The Oil Pump Outlet where it meets the engine block is also CNC “Port Matched”, for a perfect transition into the engine block. The Inlet and Outlet sides of the gerotor are also opened up on the CNC mill to reduce inlet side cavitation, and to reduce outlet side pressure drops. The pressure relief valve piston is REM Polished, which provides a non-directional, low Ra, polished finish. This reduces friction, heat and possibility of the relief valve piston galling and sticking, a common failure point on the OEM pumps. The piston is reinstalled and confirmed to operate correctly. The rotors are measured and checked to be within the manufacturer's specification - aka Blueprinted, and installed next. The pump is then put together with a light coating of assembly lube to reduce friction and scuffing and aid in priming on first start up.
  • The 11mm Subaru Oil pump is one of the most popular off the shelf pumps to use on EJ25 engines. Originally equipped on the 2008-21 STI Dual AVCS engines, it provides an adequate amount of pressure and flow that fits the needs of many OE and built engines. But, as with almost anything, there is room for improvement. Increasing oil flow volume and pressure in an EJ25 ensures that the bearings have sufficient oil film under all power levels and driving conditions. Additional oil flow to the engine provides a greater oil reserve to operate the AVCS solenoids and cam gears - giving you more consistent performance results. The IAG Stage 2 CNC Ported 11mm oil pump was developed over years of servicing street and racing engines. In that time IAG has tested and utilized the majority of the popular Subaru oil pumps available on the market (JDM, Cosworth, ACL etc.) for customer, personal and racing vehicles. Over the last few years if you wanted an upgraded oil pump over the stock 11mm you would either buy a hand ported model from a trusted source, or often an OEM JDM (Japanese Market) 12mm pump. We believe that we have developed a better alternative. The IAG Stage 2 CNC Ported 11mm oil pumps have shown through lab testing on a Spintron Machine that it will outperform a JDM 12mm. The Stage 2 Oil pump is a cost effective solution that outperforms the market standards. This pump has been extensively tested on street cars, track cars, and on our in-house Spintron to ensure consistent and repeatable performance.


  • IAG-ENG-2240
  • IAG-ENG-2240
  • 887753836342
  • IAG Performance
  • New


Shipping Information

  • Item Requires Shipping
  • 3.6 lbs.
  • W7.5000” x H3.0000” x L11.0000”
  • Free ground shipping on all order over $100.00 (some exclusions may apply)

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