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IAG Performance

IAG Performance Air/Oil Separator (AOS) for Subaru Impreza WRX 08-14, STi 08-21 (Black)

    • Based on 23 reviews
Condition: New
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Availability: Only 3 left in stock, order soon!
Fulfilled by IAG Performance
Arrives Nov 29 – Dec 4
Order within 14 hours and 46 seconds
Available payment plans shown during checkout

Color: Black


Size: WRX 08-14, STi 08-21


Features

  • KEEPING OIL OUT - 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. 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.
  • 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. The EJ engine has 3 ports that vent crank pressure: one on each cylinder head, and another on the top of the block. Each engine vent port receives its own connection to the AOS. By giving each engine port its own entrance to the AOS, IAG has allowed for more effective and faster excavation of crankcase pressure.
  • SWIRL POT - The IAG Performance 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 IAG AOS' fully-heated cast aluminum housing, superior venting, and unique baffle design set it apart from the rest. The AOS is compatible with all fuel types, extends engine life, improves crankcase ventilation and is compatible with standard ECU calibrations.
  • TESTED FOR YEARS - The IAG Performance Street V3 Air / Oil separator (AOS) is an excellent investment to keep your EJ engine running well. The AOS maintains OEM PCV system functionality, but supplements its capacity. The IAG AOS design is based on years of extensive testing on standard and competition applications.
  • AOS BODY - Compact cast aluminum design has approximate 1 liter holding capacity integrated.

Manufacturer: ‎IAG Performance


Brand: ‎IAG Performance


Item Weight: ‎10.5 pounds


Product Dimensions: ‎12 x 12 x 6 inches


Country of Origin: ‎USA


Item model number: ‎IAG-ENG-7181BK


Exterior: ‎Black


Manufacturer Part Number: ‎IAG-ENG-7181BK


OEM Part Number: ‎IAG-ENG-7181BK


Date First Available: March 23, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 29 – Dec 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • This is a necessary mod. Iag’s customer service is amazing.
Color: Red Size: WRX 08-14, STi 08-21
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
This is a pain in the ass to do if you’re mechanically inclined. It takes specific tools and lots of patience to do. Took me about a day and a half to do. Print the instruction pdf from iags website based on your specific car, don’t just rely on YouTube videos. Your car will thank you for this mod, I found oil all throughout the intercooler and throttle body. The newest kit they make has most of the hoses precut and fittings akin to fuel line connectors! Excellent quality. You’ll have to make a few cuts to hoses that run for your coolant lines from turbo to coolant tank and drain tube to engine. Take your time on routing these lines and measure 3 times before you cut. WORD OF CAUTION: check your kit for ALL PIECES. I found one of the bags cut open and taped shut, I was missing a union(wasn’t necessary for my 16’ STI. Contacted aig through Amazon and iag sent me the piece in 2 days! Amazing customer service! Make sure to bleed the air out of your coolant system when you’re done and check for leaks! Good luck and have PATIENCE! 🙏🏼 ... show more
Reviewed in the United States on March 29, 2024 by Amazon Customer Amazon Customer
    • A must for all turbo engines (2011 Subaru Forester XT)
Review Image by UHDW8 UHDW8
This IAG AOS and the cylinder 4 cooling mod are my favorite engine mods so far. Cleaned the throttle body prior to installation, then after install an idle relearn. Engine feels happier. No more burning oil, no more oil vapors in the intake. This should be the first mod to your engine.
Reviewed in the United States on April 21, 2024 by UHDW8 UHDW8
    • Everything fit as it should
Color: Black Size: WRX 08-14, STi 08-21
Product came fast and was packaged properly. Would recommend the product to anybody. Installation was medium difficulty.
Reviewed in the United States on April 26, 2024 by Bryten Monroe
    • Download the installation guide before you start.
Color: Red Size: WRX 15-21
Be sure to have the directions readily available from the iag website even if your following one of the online videos. Alot of those videos will have different modifications on the car so things will look a little different as you follow along. I've only had mine in there for a few days so far so good though. DIY time 2-5 hours. ... show more
Reviewed in the United States on November 11, 2022 by jarrett
    • Exactly as pictured
The item came in quickly without being damaged.
Reviewed in the United States on January 24, 2022 by Brayan
    • Do not trust this product
Color: Red Size: WRX 15-21
Review Image by Anibal Rosario Anibal Rosario
The media could not be loaded. I have a 2021 Wrx Premium. To start off i think its good to add that i am an ASE certified Auto Tech. As im driving on the highway on my way home from work, i noticed that the coolant guage was higher than usual. I have the center dash screen set to Oil temp, boost pressure, and MPG. Oil temp was reading high at 235°F. Its always at 190-200. As i start heading towards a hill, the coolant temp guage spikes to HOT and get an overheating dash light. With no emergency lane nearby, i jump the curb and shut the engine off before catastrophic engine damage can occur. Waiting for a tow, i try to figure out what happened but with no lights or tools on hand, no luck. As my car arrives home with a $200 tow bill, i start to trace the coolant hoses and found the hose that leads directly from the AOS to the turbo coolant tube was loose. The provided clamp with the kit had given out and was no longer holding pressure as you can see in the attached video. Coolant had pissed out through the clamp. Ironic how i spent close to $500 for this system to better protect the engine, almost cost me an entire engine. Do yourself a favor and do not use the provided clamps. Youll thank me when you dont have to get towed to the dealer for a blown engine in which most likely they will not want to warranty as this is not an OEM Subaru part. Their excuse will be, “if this was not installed, engine wouldnt have blown”. ... show more
Reviewed in the United States on November 8, 2022 by Anibal Rosario Anibal Rosario
    • Clamps they give very cheap and flimsy
Color: Black Size: WRX 22+
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
Review Image by Amazon Customer Amazon Customer
None like OEM silver clamps in the pictures, their black clamps have split ends. It is very hard to clamp it down and move it into the places and it easily go out of its shape. And do not hold much pressure NONE LIKE OEM which have solid ends and much thicker material.
Reviewed in the United States on July 26, 2023 by Amazon Customer Amazon Customer
    • Good quality
Took me little time to install but the quality is great.
Reviewed in the United States on February 14, 2023 by Minada

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