Skip to content

IAG Performance V3 Street Series Air / Oil Separator (AOS) Wrinkle Red 2022-2023 WRX

Save 15% Save 15%
Original price $499.99
Original price $499.99 - Original price $499.99
Original price $499.99
Current price $424.99
$424.99 - $424.99
Current price $424.99

The IAG Performance V3 Street Series Air / Oil separator (AOS) is an excellent investment to keep your Subaru vehicle running well. The Street Series AOS maintains OEM PCV system functionality, but supplements its capacity. The Street Series AOS design is based on years of extensive testing on standard and competition applications. The Street Series AOS' large, 1-liter, cast aluminum swirl pot canister more effectively separates oil from the PCV system upstream of PCV gasses return to the intake system. The Street Series AOS' fully-heated cast aluminum housing, superior venting, and unique, patent pending, baffle design set it apart from the rest. The Street Series AOS is compatible with all fuel types, extends engine life, improves crankcase ventilation and is compatible with standard ECU calibrations.

Keeping oil out of the engine intake tract is extremely important towards preventing premature mechanical failure and maintaining performance. Oil in the intake tract of the engine has several detrimental effects. First, the oil coats the internal portions of the intake, intercooler, and piping. This oil may cause premature failure of rubber or silicone hoses, which leads to failed connections. Once the oil reaches the intake tract it will directly enter the intake manifold and then the combustion chamber of the engine. Oil inside of the combustion chamber can cause detonation and preignition, high emissions, smoke, loss of power, decreased gas mileage, and even catastrophic engine failure leading to expensive repair bills.

The Street Series AOS maintains the OEM PCV system functionality, but supplements its capacity. The Street Series AOS PCV discharge gasses return to the turbo inlet, retaining a PCV valve to draw additional suction, improving air oil separation. The Street Series AOS protects from oil dilution and lubrication failures in ethanol fueled application because the Street Series AOS captures fuel vapors out of the oil and returns these vapors to the intake tract for combustion. The Street Series AOS protects from both oil entrainment in the intake flow and oil dilution in the engine's lubrication system far better than the OEM PCV system alone.


  • True 360 Degree Rotating Breather Port
  • Dual Breather Ports
  • Greater Pressure Stream Oil Separation
  • Compact Cast Aluminum Design
  • Approximate 1 Liter Holding Capacity
  • Integrated ORB Ports
  • Aluminum Body is powder coated in Red or Black Wrinkle Finish
  • The side of the AOS features 3 -8 ORB removable billet hose barbs.
  • Unique Baffling Controls Crankcase Pressure
  • Returns Oil To The Engine
  • No Maintenance or Manual Draining Required
  • Includes all fitting required for installation
  • Includes unique billet aluminum coolant swivel fittings

Installation Instructions: 

Customer Reviews

Based on 3 reviews
Not cheap

But a new engine is way more. This is a must have. So many videos to watch as you install.


Thank you for taking the time to leave your 5 Star Review of the IAG Performance V3 Street Series Air/Oil Separator (AOS) in Wrinkle Red for your 2022-2023 WRX. It is great to hear that you consider it a must-have for your vehicle. The investment in a quality AOS is indeed worthwhile for the long-term health of your engine, as you rightly mentioned. The availability of installation videos is a valuable resource. Enjoy the added protection and performance benefits of your AOS, and thank you for your feedback!


Chris conde

Smart mod, don't cheap out! IAG has youtube video up now for at home installers too


I run this same AOS and I couldn't be happier! IAG Performance has designed this AOS to best protect your motor from any harmful gases and contaminants, which keeps you on the road longer! Thank you for the 5 Star Review!



The lack of printed installation instructions from IAG was annoying but shipping was pretty quick once it was available and it looks great under the hood. I’m sure it’s doing it’s job.


The IAG Performance V3 Street Series AOS is one of the best improvements you can make to your WRX. IAG offers printable PDF instructions directly on their website, and the Subimods Team is always available for installation inquiries! Although most likely too late for you, I have included the link below. It absolutely is doing its job! I have had mine installed since 2014, and it continues to perform! Thank you for your 5 Star Review!


Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare