IAG Performance Air / Oil Separator (AOS) for 2022-2025 WRX | IAG-ENG-7188

The IAG Air / Oil Separator adds a one-liter cast-aluminum separator to the FA24F crankcase-ventilation system. Its internal swirl pot and baffles remove suspended oil from PCV gases, while engine coolant heats the canister to reduce condensation and separated oil drains back to the crankcase. The kit retains the factory PCV function and uses application-specific SAE quick-connect hoses and a strut-tower bracket. IAG's current installation manual confirms 2022-2025 WRX fitment and lists black, red, neon yellow, gold, World Rally Blue, and hyper pink part-number variants; the storefront still says 2022-2024, and neither source confirms 2026. Installation requires removal of the intercooler, charge pipe, radiator fan, and several PCV/coolant connections. No tune is identified.