Perrin Black Air Oil Separator Subaru WRX 2008-2014 / STI 2008-2021 w/ TMIC

Rated 5.0 out of 5
Based on 1 review
20 In stock
Engine Air Oil Separator

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Fitment Information:

2008-2014 Subaru WRX w/ Top Mount Intercooler

2008-2021 Subaru STI w/ Top Mount Intercooler


  • Reduces the chances of detonation 
  • Traps oil from the crankcase ventilation before it enters the intake system
  • Increases intercooler efficiency by reducing the amount of oil deposited into your intercooler and intake system
  • Reduces carbon buildup in the combustion chamber, intake valves, and intake tract
  • Separates engine oil from water vapors and allows the oil to drain back into the engine
  • Durable Wrinke Black Powder Coating
  • Difficult Installation Effort
  • Estimated Installation Time - 3 Hours
  • Installation Instructions
  • No Tuning Required

    What's in the Box:

    • (1) PERRIN Air Oil Separator
    • (1) Car Specific Bracket
    • (1) PERRIN License Plate Frame
    • All necessary hardware for installation
    • Warranty & Instructions

    As blow-by/oil builds up inside your intercooler, the less efficient it becomes due to less heat being transferred away from your engine. This leads to power loss and detonation, which can be damaging to your engine. The AOS will reduce carbon build up in the combustion chamber, intake valves, and in your intake tract. The crank case blow-by is recirculated back to the intake to be ingested by the engine, but in doing so, gets stuck in the intake tract, intake valves, and the intercooler. This builds up over time which causes a loss in power and extra wear and tear on your valve train.

    average rating 5.0 out of 5
    Based on 1 review
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    1 Review
    Reviewed by Alejandro V.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5
    Review posted

    Great product

    Everything was good, shipping is pretty quick. this air oil separator was a little tricky for me took a little longer than it should’ve. but at the end it all worked out looks great, awesome product.

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    Perrin Black Air Oil Separator Subaru WRX 2008-2014 / STI 2008-2021 w/ TMIC
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