The Perrin Air Oil Separator separates oil from the air draining it back to the engine which eliminates the need for constant attention draining the oil.
Reduces carbon build up
Increases intercooler efficiency
Reduces chance of performance robbing detonation
2002-2007 WRX - 2002-2005 WRX installation requires the removal of cruise control module.
2015-2020 WRX - Modifications may be needed if installed with after-market air intake box, contact tech for further details.
2015-2020 WRX- Does not work on vehicles with EyeSight.