IAG Street Series Air/Oil Separator (AOS) 2006-2007 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 2006-2007 Subaru WRX and 2004-2007 STI.