Enhance the performance and longevity of your 2008-2014 Subaru WRX or 2008-2021 STI with the IAG Performance Air / Oil Separator (AOS). Engineered through years of rigorous testing, the IAG AOS is the ultimate solution to safeguard your engine from the harmful effects of oil in the intake tract. Featuring a 1-liter swirl pot canister made from durable cast aluminum, this AOS efficiently separates oil from PCV gases, preventing contamination in your intake system. It integrates seamlessly with your Subaru’s factory ECU settings, requiring no tuning, and works with all fuel types.

This high-quality Air / Oil Separator includes a unique baffle design and superior ventilation that ensures optimal crankcase ventilation. It eliminates the risks of oil accumulation in critical engine components, preventing premature wear, power loss, excessive emissions, and even catastrophic engine failure. Additionally, the IAG AOS is designed for minimal maintenance, with oil collecting inside the canister and draining back into the engines crankcase without the need for regular draining.

Whether you’re concerned about the performance of your engine under everyday driving or aggressive conditions, the IAG Air / Oil Separator offers unparalleled protection. With quick and easy installation via custom SAE Quick Connection lines, the IAG AOS not only enhances performance but also adds a sleek, factory-like finish to your engine bay. Choose from three color options black, red, or neon yellow to match your style.