IAG Air-Oil Separator (AOS) Fits 2015-21 Subaru WRX, 2014-18 FXT

This is IAG’s maintenance-free air oil separator for this chassis. It is a real PCV control piece, not just a can you have to keep emptying.

• Cast aluminum canister with internal baffling to pull oil out of the PCV stream
• Returns separated oil back to the crankcase so it stays street friendly
• Built for 2015-2021 WRX and 2014-2018 Forester XT
• Helps keep oil out of the intake tract, intercooler, and charge piping

Why you’d want it: if the car sees spirited street driving, track time, or just long-term ownership where you want cleaner intake plumbing and better crankcase control, this is one of the better upgrades you can make.

If you are leaning on a FA20 DIT car at all, this is one of the cleaner ways to help keep oil out of the charge side.

AOS Color: Choose Black, Red, Neon Yellow from the product options.