The IAG Air / Oil Separator (AOS) is a smart move to protect and enhance your Subaru's performance. Developed over years of extensive testing on a range of standard and competitive applications, the IAG AOS offers unparalleled protection for your 2020+ Subaru Outback XT and 22+ Outback Wilderness. Our exclusive AOS design incorporates a 1-liter cast aluminum swirl pot canister that significantly improves oil separation from the PCV system before returning PCV gasses to the intake. Crafted from a lightweight yet durable aluminum housing, the IAG AOS provides enhanced ventilation and features an innovative baffle design that sets it apart from the competition. This AOS is compatible with all fuel types, prolongs the lifespan of your engine, improves crankcase ventilation and features our innovative baffle design that sets it apart from competitors’ products.