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

Original price $499.99 - Original price $499.99
Original price
$499.99 - $499.99
Current price $499.99

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 2 reviews
Ryan Yob

Bought this in hopes of keeping the engine in better condition for a longer time. Simple enough install. iAG has a youtube video that shows step by step fairly well. Only problem I had with install was cutting plastic fitting on PCV hose but otherwise I’m very happy with


Thank you for your 5 Star Review of the IAG Performance V3 Street Series Air/Oil Separator for your 2022-2023 WRX. It is great to hear that you found the installation process manageable and that IAG's instructional video was helpful. Taking the initiative to watch such guides can make a significant difference in ensuring a smooth installation. Your satisfaction with the AOS, and its potential to maintain your engine's health in the long run, is valuable information for those considering this upgrade.


Denny Bae
For longevity

Bought this for the longevity of my 22 WRX. Install was simple enough. The only reason why I docked one star is because of the fitment into my engine bay. When I place it like the installation video it rattles on the charge pipe while driving. When I place it a level higher it touches the hood bit when I close it. I opted for it touching the hood a little bit rather than it making a rattling noise while driving.


We appreciate your feedback regarding the IAG Performance V3 Street Series Air/Oil Separator (AOS) for your 2022 WRX. It is great to hear that you purchased it with the goal of improving the longevity, as an AOS is absolutely the perfect option! We understand that you encountered some fitment challenges during installation, which resulted in a slight compromise. While it's unfortunate that you had to choose between the AOS touching the hood or causing a rattling noise, we are glad you found a solution that worked for you!


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