IAG Air Oil Separator AOS Subaru 08-14 WRX, 08-20 STI

Rated 5.0 out of 5
Based on 6 reviews
IAG
IAG-ENG-7181RD
22 In stock
Engine Air Oil Separator

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$439.99
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Color :
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$439.99

IAG-ENG-7181

Fitment:

  • Subaru WRX 2008-2014
  • Subaru STI 2008-2020
  • Legacy GT 2005-2009
  • Forester XT 2009-2013

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
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.

PCV Recirculation
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.

Version 2 vs Version 3 IAG AOS
The most popular Subaru AOS is now even better! The IAG AOS body is completely redesigned using cast aluminum and features an integrated coolant passage for better heat retention. Additionally, the V3 AOS heating system is upgraded by relocating the coolant lines to the bottom of the body using new swivel fittings, heat sleeving and an integrated coolant bleeder. These heating system upgrades will allow for a cleaner installation and less condensation buildup in colder climates. The new compact body has the same 1-liter capacity as V2, but features a sleeker design and adds removable ORB fittings for greater versatility.

average rating 5.0 out of 5
Based on 6 reviews
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6 Reviews
Reviewed by Christopher V.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Iag aos install 💪🏽

Love this aos!! Couldnt wait to add to my Subaru but things works great!!

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Reviewed by Dylan A.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Must need for our Subarus!

We all like adding power to our cars, but let’s not forget about reliability mods! This goes a long way into protecting our cars. Must have patience to install this, but once it’s done it’s a nice peace of mind knowing you took a step into keeping your car healthy!

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Reviewed by Parker M.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

No reason not to buy.

Before you think about pushing crazy power, we all know EJs have problems. Save yourself the headache later and do it right from the start. IAG is the best in the business. Just send it

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Reviewed by Geovanny Z.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Must need!

Must need! I had the normal knock (1.40) but after installing this. I don’t have any knock.

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Reviewed by Noah R.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Great Reliability Mod!

This mod is a great addition to any Subaru motor. With that being said it is a difficult install and takes some time. I am very impressed with this IAG product.

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IAG Air Oil Separator AOS Subaru 08-14 WRX, 08-20 STI
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