Fast, Free Shipping W/ Insurance On Orders Over $199
Mon-Fri 6am - 6pm
+1-888-627-3736 Speak To An Expert
Choose Your Car 
  • IAG Performance Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-7200) - Modern Automotive Performance
 - 2
  • IAG Performance Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-7200) - Modern Automotive Performance
 - 3
  • IAG Performance Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-7200) - Modern Automotive Performance
 - 4
  • IAG Performance Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-7200) - Modern Automotive Performance
 - 5
  • IAG Performance Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-7200) - Modern Automotive Performance
 - 6
  • IAG Performance Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-7200) - Modern Automotive Performance
 - 7
  • IAG Performance Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-7200) - Modern Automotive Performance
 - 11
  • IAG Performance Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-7200) - Modern Automotive Performance
 - 12
  • IAG Performance Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-7200) - Modern Automotive Performance
 - 13
  • IAG Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-72)
  • IAG Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-72)
  • IAG Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-72)
  • IAG Competition Series (AOS) Air/Oil Separator | Subaru Impreza WRX /STI (IAG-ENG-72)

    MAP price match guarantee Unbeatable Price Guarantee
    no codes, no bs, just parts

    IAG PERFORMANCE

    IAG Competition Series

    PART#
    We Price Match!

    Contact us to ensure you're getting the right part for your car at the absolute best pricing on earth!

    Email - sales@maperformance.com
    Phone 1(888)627-3736



    $ 379.99   $ 398.99
    You Save % ()


    Built To Order Free delivery by , to your door when ordered within hrs and mins
    Fits Your
    MAP Loyalty: Earn $ 7.60 Toward Next Purchase!

    IAG PERFORMANCE COMPETITION SERIES AIR / OIL SEPARATOR (AOS)

    The IAG Performance Competition Series billet aluminum Air / Oil separator (AOS) vents crankcase vapors to the atmosphere. The design is based on years of service on racing and high horsepower Subaru's. The AOS's approximate 1-liter capacity, fully heated housing, superior breathing, and unique patent pending baffle design set it apart from the rest.

    As the air makes its way through the multi-stage baffle system, gravity pulls oil from the air. By increasing the diameter of the breather opening on the top of the AOS, we have drastically decreased the exit velocity of the crankcase vent (CCV) stream. The slower velocity leads to greater oil separation from the pressure stream. A total of 9 mounting holes enables the breathing port a full 180° of rotation. On the bottom, a thick Viton o-ring seals the can. Every o-ring in our AOS is formed from Viton which offers superior temperature and chemical resistance.

    Features

    • Large Billet Aluminum Design
    • Approximate 1 Liter Holding Capacity
    • Integrated 3 Port Billet Hose Barbs
    • Aluminum Body Powder Coated Black, Red
    • All fittings supplied with the AOS are anodized aluminum and feature Viton sealed ORB fittings

    Benefits

    • Unique Baffling Controls Crankcase Pressure
    • Reduces Moisture & Oil Mixing
    • 180° Breather Port Rotation For Install Ease​
    • Returns Oil To The Engine
    • No Maintenance or Manual Draining Required

    Please Note:

    • The IAG AOS is not compatible with most aftermarket strut tower bars​

    Applications

    • 2006-2007 Subaru WRX / 2004-2007 STI (IAG-ENG-7250)
    • 2008-2014 Subaru WRX / 2008-2019 STI (IAG-ENG-7251)
    • 2015-2018 Subaru WRX​ (IAG-ENG-7252)

      What's in the Box?

      • Hardware, Lines & Fittings Included​
      • Multi-point Adjustable Mounting Bracket​
      • Ready To Install

      References

      Warranty

        IAG PERFORMANCE COMPETITION SERIES AIR / OIL SEPARATOR (AOS)

        The IAG Performance Competition Series billet aluminum Air / Oil separator (AOS) vents crankcase vapors to the atmosphere. The design is based on years of service on racing and high horsepower Subaru's. The AOS's approximate 1-liter capacity, fully heated housing, superior breathing, and unique patent pending baffle design set it apart from the rest.

        As the air makes its way through the multi-stage baffle system, gravity pulls oil from the air. By increasing the diameter of the breather opening on the top of the AOS, we have drastically decreased the exit velocity of the crankcase vent (CCV) stream. The slower velocity leads to greater oil separation from the pressure stream. A total of 9 mounting holes enables the breathing port a full 180° of rotation. On the bottom, a thick Viton o-ring seals the can. Every o-ring in our AOS is formed from Viton which offers superior temperature and chemical resistance.

        Features

        • Large Billet Aluminum Design
        • Approximate 1 Liter Holding Capacity
        • Integrated 3 Port Billet Hose Barbs
        • Aluminum Body Powder Coated Black, Red
        • All fittings supplied with the AOS are anodized aluminum and feature Viton sealed ORB fittings

        Benefits

        • Unique Baffling Controls Crankcase Pressure
        • Reduces Moisture & Oil Mixing
        • 180° Breather Port Rotation For Install Ease​
        • Returns Oil To The Engine
        • No Maintenance or Manual Draining Required

        Please Note:

        • The IAG AOS is not compatible with most aftermarket strut tower bars​

        Applications

        • 2006-2007 Subaru WRX / 2004-2007 STI (IAG-ENG-7250)
        • 2008-2014 Subaru WRX / 2008-2019 STI (IAG-ENG-7251)
        • 2015-2018 Subaru WRX​ (IAG-ENG-7252)

          What's in the Box?

          • Hardware, Lines & Fittings Included​
          • Multi-point Adjustable Mounting Bracket​
          • Ready To Install

          References

          Warranty

            Customer Reviews

            Based on 6 reviews
            100%
            (6)
            0%
            (0)
            0%
            (0)
            0%
            (0)
            0%
            (0)
            T
            T.R.
            IAG AOS

            Pretty easy straight forward install looks great.

            J
            J.S.
            2018 AOS Competition series

            Works great, installing is straight forward until you get to the breather behind the A/C pump. There is no disconnecting the line, you must unbolt compressor. Slide it ahead, cut the line near top bend amd then install the supplied hose with just the 90* fitting. Cut that 4” length off amd zip tie it. The EXU is different in 2018 it is actually moRe forward than previous year so my new bracket is actually being unused lol. You still need the room there tho because the old bracket is im the way.

            J
            J.M.
            IAG AOS

            Arrived very quickly, and fairly easy install. You can’t put a price on saving a subies life. This was a smart purchase. All subies need this stock or modded

            J
            J.C.
            IAG Makes Subies Happy!

            My AOS arrived right on time and the packaging was great. My only complaint is that the logo sticker on the side was already coming off when it arrived.But all cosmetic issues aside, I absolutely love this IAG and this AOS. I was able to retain my SPT Strut Tower Brace with this unit. Highly recommend poicking one of these up for your Subie.

            c
            c.c.s.
            Just get it,you wont regret it !

            Best AOS on the market in my opinion , its compact and sleek design will fit almost anywhere in your engine compartment ,and looks bad as_ too ! It will also save your turbo from detonating !

            MAP Limited Lifetime Warranty

            1.) All MAPerformance in-house fabricated parts include a Limited Lifetime Warranty for the Original Purchaser. This warranty only applies to the original purchaser and is non-transferrable. If the product fails it would need to be determined by MAPerformance that it is due to manufacturing defects in materials or workmanship.

            2.) This does not cover normal wear and tear. Improper use, modification, or abuse voids this warranty. MAPerformance will not be held responsible for additional costs due to the failure of a product (cost of sale, towing, labor, etc.). Warranty claims must be submitted to MAPerformance for review.

            3.) You must create a support ticket to acquire your return authorization number prior to returning the product.

            4.) Warranty claims will not be honored if the product was not purchased through an approved dealer.

            For warranty evaluation please create a support ticket via this form here.

            We use cookies to offer a better browsing experience, analyze site traffic, personalize content, and serve targeted advertisements. Please review our privacy policy & cookies information page.  If you continue you consent to our privacy policy & use of cookies.Accept

            Hello!

            Unfortunately due to vendor restrictions we are unable to sell this brand within Australia or the UK. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

            Hello!

            Unfortunately due to vendor restrictions we are unable to sell this brand within Australia. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

            Hello!

            Unfortunately due to vendor restrictions we are unable to sell this brand within your country. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.

            Hello!

            Unfortunately due to vendor restrictions we are unable to sell this brand within California. If you have any questions, feel like you received this message in error or would like suggestions on other brands please contact us here.