IAG Performance Air/Oil Separator (AOS) for Subaru Impreza WRX 08-14, STi 08-21 (Black)
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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 3 left in stock, order soon!
Arrives
Sep 8 – Sep 12
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Color: Black
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
Part Number: IAG-ENG-7181BK
Item Weight: 10.5 pounds
Product Dimensions: 12 x 12 x 6 inches
Country of Origin: USA
Item model number: IAG-ENG-7181BK
Size: WRX 08-14, STi 08-21
Color: Black
Material: Aluminum
Item Package Quantity: 1
Included Components: 1x Mounting Bracket, 1x SAE Quick Connect Hose And Fitting Kit, 1x Air Oil Separator in Black
Warranty Description: 1 year manufacturer
Date First Available: March 23, 2021
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sep 8 – Sep 12
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Black
My 2012 STI is significantly running better after the install of this AOS. I had bypass oil/sludge build up which is now a thing of the past! No more running lean code too 😅 There was one pcv fitting that was hardly damaged during shipment and the service department at IAG called me back first thing in the morning ( I called and left voicemail after hours ) and over night shipped me a whole new hose. I Highly recommend this product.
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Reviewed in the United States on February 22, 2025 by Darren
Color: Red
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! 🙏🏼
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Reviewed in the United States on March 29, 2024 by Amazon Customer Amazon Customer
Color: Red
Exacto, según la descripción.
Reviewed in the United States on November 12, 2024 by Luis González
Color: Red
Grate quality and packaging fast shipping
Reviewed in the United States on October 21, 2024 by Husam Adel Husam Adel
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
Color: Black
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
Took me little time to install but the quality is great.
Reviewed in the United States on February 14, 2023 by Minada