Cobb Air Oil Separator Subaru WRX 2002-2007 / STI 2004-2007 | 811615 ships-from-manu and even the 'banana arm'

and even the 'banana arm'

the slightly oversized bore diameters will allow for up to 0

250% increase in torque capactiy

MAF will need to be re-scaled upon installation

Cobb Air Oil Separator Subaru WRX 2002-2007 / STI 2004-2007 | 811615 ships-from-manu and even the 'banana arm'Fitment Information: 2002 2007 Subaru WRX 2004 2007 Subaru STI 2004 2008 Subaru Forester XT The COBB Subaru Air Oil Separator helps to prevent crankcase oil vapors from recirculating back through your engine's intake system. Oil vapors passing through your engine's intake system lower the effective octane rating of fuel and can contribute to both oil and carbon buildup over time. Features: 1 Liter Holding Capacity Integrated ORB Ports Compact Cast