IAG Stage 2 CNC Ported EJ25 11mm Oil Pump - Subaru Models (inc. 2002-2014 WRX / 2004-2021 STI)

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The Pressure relief valve piston is then REM polished which provides a non-directional, low RA polished finish. This will reduce friction, and heat, and helps prevent the relief valve piston from galling and sticking which is a common failure point of the OEM pumps.

SPECS:

• 11mm oil pump rotors
• Shimmed and REM polished pressure relief valve
• Measured, blueprinted, and assembled
• Packed with assembly lube
• Ships ready to install with all required hardware
• CNC ported to maximize flow and pressure to reduce cavitation risks
• Tested to outperform other commonly available pumps
• Designed for single and dual AVCS engines
• Great for IAG Stage 2 and built engines used for street and competition cars
• Fits all EJ series Subaru Engines

IAG Stage 2 CNC Ported EJ25 11mm Oil Pump

This is the IAG Performance Stage 2 CNC Ported 11mm Oil Pump that has been designed to provide an adequate amount of oil pressure and flow that fits the needs of many OE and built engines. This oil pump ensures that the bearings have sufficient oil film under all power levels and driving conditions, as well as providing a greater oil reserve to operate the AVCS solenoids and cam gears to provide consistent performance results.

This is the IAG Performance Stage 2 CNC Ported 11mm Oil Pump that has been designed to provide an adequate amount of oil pressure and flow that fits the needs of many OE and built engines. This oil pump ensures that the bearings have sufficient oil film under all power levels and driving conditions, as well as providing a greater oil reserve to operate the AVCS solenoids and cam gears to provide consistent performance results.

Previously if you wanted an upgraded oil pump over the stock 11mm you would have to purchase a hand-ported model or after a JDM 12mm pump. IAG has developed a better alternative that has been lab-tested on a Spintron machine that will outperform a JDM 12mm. Each IAH Stage 2 Oil Pump starts life as an OEM-spec 11mm oil pump straight from Subaru, then it is completely disassembled including pulling the rotors, backing plate, and pressure relief valve. The body is fixtures in IAG's in-house 5-axis CNC machined where the inlet and outlet passageways are CNC ported. This allows for a larger and more consistent pathway for the oil into and out of the gerotor internals and helps to prevent cavitation. The oil pump where it meets the 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 the outlet side pressure drops.

The Pressure relief valve piston is then REM polished which provides a non-directional, low RA polished finish. This will reduce friction, and heat, and helps prevent the relief valve piston from galling and sticking which is a common failure point of the OEM pumps.