This is the same oil pump that came stock on the 2008 STI
This will fit all WRX and STI 2.5 EJ25 motors
These have an 11MM pump that flows more volume than the standard pumps from the 04-07 STI, so these make for a great upgrade when you are building the motor, or changing the timing belt
ALWAYS USE A NEW OIL PUMP WHEN REBUILDING THE EJ
This is the Subaru OEM 11mm Oil Pump. This oil pump is available for separate purchase for those of you who need a direct replacement. Any time you rebuild or replace the engine in your vehicle, it is very important that you always start fresh with a new oil pump as used oil pumps could be hiding old engine debris which can cause damage that will ultimately lower your oil pressure.