IAG V3 Competition Series Air/Oil Separator | 2008-2014 Subaru WRX / 2008-2021 Subaru STI

V3 Competition Series Air/Oil Separator by IAG Performance

Competition Series AOS are “Competition Only” components for installation exclusively on “Competition” vehicles or “Racing” vehicles not subject to pollution control. IAG recommends the Competition Series AOS for Competition vehicles with greater than 600 WHP output.

The IAG Performance V3 Competition Series Air / Oil separator (AOS) is an excellent investment to keep your Subaru Competition Vehicle running well. The Competition Series AOS keeps oil out of the intake system of your engine by venting crankcase vapors to the atmosphere. The Competition Series AOS design is based on years of extensive testing on racing and high horsepower Subaru s. The large, 1-liter, cast aluminum swirl pot canister collects the oil from the PCV system and allows it to drain away before the PCV gases are vented to the atmosphere, preventing all oil from reentering the intake tract. The AOS's fully-heated cast aluminum housing, superior venting, and unique, patent pending, baffle design set it apart from the rest. The Competition Series AOS is best suited for Drag Racing, Road Racing, and high horsepower Competition applications looking for superior crankcase ventilation. The Competition Series AOS may require additional tuning calibration. Please consult a tuner for more information.

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.

The Competition Series vents the PCV gases to the atmosphere via a large 1” diameter vent hose. All oil in the CCV systems is prevented from entering the intake tract. IAG’s V3 AOS also eliminates the OEM PCV valve which is known to fail in high horsepower applications.

The most popular Subaru AOS for Competition use 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.

Features

• True 360° Rotating Breather Port
• Large Breather Port For Maximum Ventilation
• Greater Pressure Stream Oil Separation
• Compact Cast Aluminum Design
• Approximate 1 Liter Holding Capacity
• Integrated 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
• Unique Baffling Controls Crankcase Pressure
• 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

• 2008 - 2014 Subaru WRX
• 2005 - 2009 Subaru Legacy GT
• 2008 - 2020 Subaru STI
• This product is not compatible with most aftermarket strut tower bars

What's In The Box?

• V3 Competition AOS Body Assembly
• Hardware, Lines & Fittings Included

References

• PDF Instructions for 08-14 WRX / 05-09 LGT IAG Performance Air Oil Separator
• PDF Instructions for 08-14 STI IAG Performance Air Oil Separator
• PDF Instructions for 15-21 STI IAG Performance Air Oil Separator
  

Warranty

• Manufacturer Standard Warranty