IAG Air Oil Separator Street AOS Subaru WRX 2008-2014 / STI 2008-2021 – Import Image Racing
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IAG Street Air Oil Separator AOS Subaru WRX 08-14 / STI 08-21 / Forester XT 09-13 | IAG-ENG-7186
IAG Street Air Oil Separator AOS Subaru WRX 08-14 / STI 08-21 / Forester XT 09-13 | IAG-ENG-7186
IAG Street Air Oil Separator AOS Subaru WRX 08-14 / STI 08-21 / Forester XT 09-13 | IAG-ENG-7186

IAG Street Air Oil Separator AOS Subaru WRX 08-14 / STI 08-21 / Forester XT 09-13 | IAG-ENG-7186

Rated 5.0 out of 5
Based on 20 reviews
SKU: IAG-ENG-7186RD
Availability: 5 In Stock
Product Type: Engine Air Oil Separator
$499.99
$499.99
$499.99
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Fitment Information:

2008-2014 Subaru WRX

2008-2021 Subaru STI

2005-2009 Subaru Legacy GT

2009-2013 Subaru Forester XT

Instructions: 

PDF Instructions for 18-21 STI

PDF Instructions for 15-17 STI

PDF Instructions for 10-14 STI

PDF Instructions for 10-14 WRX

PDF Instructions for 08-09 WRX

SAFEGUARD YOUR SUBARU

The IAG Performance Air/Oil Separator (AOS) is a valuable investment to protect and maintain peak performance in your Subaru. Developed through years of meticulous testing on standard and competitive applications, the design of the AOS offers unparalleled protection for your engine. This AOS features a 1-liter swirl pot canister made of cast aluminum. This construction significantly enhances the separation of oil from the PCV system before the PCV gasses are directed back to the intake system.The Air Oil Separator features an aluminum housing that has superior ventilation, and it incorporates an exclusive baffle design that sets it apart from the competition. It works with all fuel types, prolongs engine lifespan, optimizes crankcase ventilation, and seamlessly integrates with standard ECU settings, so no tuning is required.

SAE QUICK CONNECTION LINES

IAG’s Air Oil Separator includes a full set of custom length SAE Quick Connection lines that not only simplify the installation of the AOS system, but they also reduce the chance of leakage because they offer a more reliable and secure connection than basic hose clamps. Once installed, this AOS system has a clean, factory-look that integrates seamlessly with your Subaru’s engine.

AOS in the Box:

  • Ready to Install
  • Hardware, Lines & Fittings Included
  • The AOS arrives completely assembled and ready for immediate installation. However, the entire unit can be broken down for cleaning. With a single allen wrench, you can remove two bolts and the AOS easily separates into individual pieces.

 Features:

  • Keep oil out of the intake
  • Improves the OEM PCV system with new check valve
  • Minimizes condensation build up


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average rating 5.0 out of 5
Based on 20 reviews
  • 5 Stars
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Customer photos and videos
Review posted
Reviewed by Miguel L.
Verified Buyer
Rated 5 out of 5

Amazing Product

I had the Grimmspeed AOS which made my engine consume so much oil that I would have to fill the entire 4.5 qts of oil in less than 100 miles. I bought this IAG Aos and install was supper simple (I already had a FMIC) 82 miles on it since install and all of my oil is still there and no more white smoke coming out the exhaust.

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Reviewed by Alexis
Rated 5 out of 5

5 Stars

A must have for the Subarus.

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Review posted
Reviewed by OMAR
Rated 5 out of 5

5 Stars

I haven’t installed yet but what I’ve seen on others reviews this is one of the first mods that you have to do in your subaru but otherwise looks pretty good

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Reviewed by Douglas J.
Verified Buyer
Rated 5 out of 5

Must have

A MUST on any Subaru, stock or modified. IAG quality is always great, wouldn’t go anywhere else

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Reviewed by Stephen S.
Verified Buyer
Rated 5 out of 5

Great quality parts

The aos is a nice addition to the engine bay and safety measure for the vehicle. I didn’t have any oil issues prior to installing it so I cannot relay any info on its performance yet. The installation overall was pretty straight forward. My biggest issue was connecting the supplied 2 inch hose with the Y fitting onto the motor with the pinch clamp installed. I literally struggled with this for hours eventually using the oem 2in hose with the clamps still installed. Everything else went smooth. Have hose cutters, hose clamp pliers, hose pinch off pliers. Make sure all hoses are always routed with a downward slope and make sure nothing is pinched once the intercooler is back on if you have one.

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Reviewed by Robert S.
Verified Buyer
Rated 5 out of 5

Wish I did it sooner

Instructions are a little iffy but good product

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Reviewed by Abraham H.
Verified Buyer
Rated 5 out of 5

IAG V3 Review

Premium quality parts. Only hiccup is the difference in amount of PCV connectors depending on specific year but if you shoot them a message you can get your problem solved quick!

https://www.youtube.com/watch?v=3k_cmx1es7M

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Reviewed by Tyler K.
Verified Buyer
Rated 5 out of 5

AOS

Lots of recommendations to run an AOS with the turbocharged boxer motors so I got this for my STI. Installing was pretty easy, except for the 5/8” Y hose that attaches to the block. Hope this helps the Subaru run strong for years to come!

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Reviewed by Seann S.
Verified Buyer
Rated 5 out of 5

Beautiful

Absolutely beautiful in the quality of this kit. I'm happy that I'll get to enjoy all of the benefits from an early engine life. Super detailed instructions.

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Review posted
Reviewed by Keenen W.
Verified Buyer
Rated 5 out of 5

Smooth

It has a nice clean finish

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