IAG Street Series Air/Oil Separator (AOS) 2002-2007 WRX/2004-2007 STI

The IAG Performance Street Series billet aluminum Air/Oil separator (AOS) vents crankcase gasses back to the turbo inlet. The design is based on years of service on racing and high horsepower Subarus. The AOS's approximately 1-liter capacity, fully heated housing, superior breathing and unique patent pending baffle design sets it apart from the rest.

Fits all 2002-2007 Subaru WRX and 2004-2007 STI.

Chose from red, black, or neon yellow reservoir color, all with black anodized trim and hardware.

NOTE: For some 2002-2005 WRX cars, you might have to relocate the cruise control module, and you may need to switch out the manifold nipple to one that has no check valve in it.