IAG Stree Series Air / Oil Separator (AOS) 2008-14 WRX & 2008-19 STI

IAG Stree Series Air / Oil Separator (AOS) 2008-14 WRX & 2008-19 STI
Product Code: IAG-ENG-7151
Availability: In Stock
IAG Stree Series Air / Oil Separator (AOS) 2008-14 WRX & 2008-19 STI
Price: $399.99

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The IAG Performance Street Series billet aluminum Air / Oil separator (AOS) vents crankcase gasses back to the turbo inlet. The design is based on years of service on racing and high horsepower Subaru's. The AOS's approximate 1-liter capacity, fully heated housing, superior breathing, and unique patent pending baffle design set it apart from the rest. 

 

Q: Which AOS is right for my vehicle?

A: It is IAG's opinion (which may differ from some builders and tuners) that you should use the following parameters to decide which AOS is correct for your vehicle:



  • Less than 600 WHP on pump gas – IAG recommends the Competition Series AOS. The Competition series provides the best venting of the PCV system and also prevents any oil suspended in the PCV gases from re-entering the turbo inlet. If you prefer not to retune the vehicle for installation of the AOS, the Street Series may be used below 600 WHP.
  • Less than 600 WHP on E85 – IAG recommends the Street Series AOS
  • Greater than 600 WHP on E85 / PUMP GAS / RACE GAS – IAG recommends the Competition Series AOS


*Please note that IAG recommends the STREET SERIES AOS for ALL cars under 600 WHP running E85 or high-ethanol fuel blends. When tuning E85, ethanol vapors tend to stay in the crankcase, which ultimately results in the oil becoming diluted and requiring extremely frequent oil changes. Pulling vacuum via the Street Series recirculating design to the inlet is ideal for ethanol tuned vehicles, and will allow the ethanol to be removed from the crankcase and burnt off as part of the combustion process. When running greater than 600 WHP on E85 IAG recommends the COMPETITION SERIES AOS and 1500-2000 mile, or every race event, oil change intervals. Please note that the COMPETITION SERIES AOS at any power level will require a custom tune.

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Tags: EJ25, STREET, AOS, STI, WRX, IAG,