Product Description
Fitment Information:
2008-2014 Subaru WRX
2008-2021 Subaru STI
2005-2009 Subaru Legacy GT
2009-2013 Subaru Forester XT
Instructions:
PDF Instructions for 18-21 STI
PDF Instructions for 15-17 STI
PDF Instructions for 10-14 STI
PDF Instructions for 10-14 WRX
PDF Instructions for 08-09 WRX
SAFEGUARD YOUR SUBARU
The IAG Performance Air/Oil Separator (AOS) is a valuable investment to protect and maintain peak performance in your Subaru. Developed through years of meticulous testing on standard and competitive applications, the design of the AOS offers unparalleled protection for your engine. This AOS features a 1-liter swirl pot canister made of cast aluminum. This construction significantly enhances the separation of oil from the PCV system before the PCV gasses are directed back to the intake system.The Air Oil Separator features an aluminum housing that has superior ventilation, and it incorporates an exclusive baffle design that sets it apart from the competition. It works with all fuel types, prolongs engine lifespan, optimizes crankcase ventilation, and seamlessly integrates with standard ECU settings, so no tuning is required.
SAE QUICK CONNECTION LINES
IAG’s Air Oil Separator includes a full set of custom length SAE Quick Connection lines that not only simplify the installation of the AOS system, but they also reduce the chance of leakage because they offer a more reliable and secure connection than basic hose clamps. Once installed, this AOS system has a clean, factory-look that integrates seamlessly with your Subaru’s engine.
AOS in the Box:
Ready to Install
Hardware, Lines & Fittings Included
The AOS arrives completely assembled and ready for immediate installation. However, the entire unit can be broken down for cleaning. With a single allen wrench, you can remove two bolts and the AOS easily separates into individual pieces.
Features:
Keep oil out of the intake
Improves the OEM PCV system with new check valve
Minimizes condensation build up
Usually ships same or next day. 
