Perrin Air Oil Separator for TMIC Red WRX / STI (2002-2007) Mitsubishi If you have to ask

If you have to ask how loud it is

The MAF sensor was located inside the airbox to ensure that the heat from the motor and headers didn't skew it's readings

comprehensive instructions

- Adjustable License Plate Placement

Perrin Air Oil Separator for TMIC Red WRX / STI (2002-2007) Mitsubishi If you have to askPerrin Air Oil Separators for the WRX STI are a great product if you want to increase your intercooler efficiency and stopping oil from entering the intake. By reducing the amount of oil that is entering the intercooler and intake system you will have a cleaner more efficient motor and less engine damaging detonation. The Air Oil separator is a great item to have on highly used daily driven cars or complete race cars. Black or red the AOS are a clean