Perrin Air Oil Separator for TMIC Red WRX / STI (2002-2007) Mitsubishi The MAF sensor was located

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

These unique spacers contain an actual catalyst substrate in the threaded body portion that wards off the evil check engine light for catalyst efficiency

The RSe12 features less spokes than the RSe14 to optimize the weight saving and visually open up the design

The exhaust is made out of 304 stainless steel

Another feature of Invidia's downpipe is the thick flanges which eliminate warping and leaking under high temperatures

Perrin Air Oil Separator for TMIC Red WRX / STI (2002-2007) Mitsubishi The MAF sensor was locatedPerrin 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