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    Air Oil Separators

    Our excellent air oil separators will keep your Subaru WRX, STI, Forester, and Crosstrek operating at its peak. By efficiently capturing and separating oil vapors from the engine's crankcase ventilation system, these ground-breaking devices keep them from contaminating the intake system. Air oil separators encourage cleaner, more efficient combustion by minimizing the quantity of oil residue that enters the combustion chamber, which improves performance and minimizes carbon accumulation. Explore the air oil separators we offer from reputable brands like Crawford Performance, IAG Performance, and Perrin Performance. Enjoy the advantages of an engine that is cleaner and more powerful by upgrading your Subaru right away.

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    49 Results

    Grimmspeed Air/Oil Separator O-ring Rebuild Kit - 2002-2014 Subaru WRX / 2004-2021 STI

    17 In Stock

    078029

    Grimmspeed Air/Oil Separator O-ring Rebuild Kit - 2002-2014 Subaru WRX / 2004-2021 STI

    $13.00
    Radium AOS-R KIT T INCLUDES 20-0255 - 2015-2021 Subaru WRX / STI / 2014-2018 Forester XT

    6 In Stock

    20-0258-00

    Radium AOS-R KIT T INCLUDES 20-0255 - 2015-2021 Subaru WRX / STI / 2014-2018 Forester XT

    $474.95
    IAG Performance V4 Air Oil Separator AOS - Black - 2004-2007 Subaru STI / 2006-2007 WRX

    IAG-ENG-7185BK

    IAG Performance V4 Air Oil Separator AOS - Black - 2004-2007 Subaru STI / 2006-2007 WRX

    $499.99
    COBB Tuning Air Oil Separator Black/Red - 2008-2014 Subaru WRX / 2008-2021 Subaru STI

    822615

    COBB Tuning Air Oil Separator Black/Red - 2008-2014 Subaru WRX / 2008-2021 Subaru STI

    5.0(4)
    $595.00
    COBB Tuning Air Oil Separator Black and Red - 2015-2021 Subaru WRX

    4 In Stock

    843615

    COBB Tuning Air Oil Separator Black and Red - 2015-2021 Subaru WRX

    $610.00
    GrimmSpeed Air/Oil Separator (Red) - 2002-2007 Subaru WRX / 2004-2021 Subaru STI

    12 In Stock

    078006R

    GrimmSpeed Air/Oil Separator (Red) - 2002-2007 Subaru WRX / 2004-2021 Subaru STI

    5.0(1)
    $315.00
    PERRIN Air Oil Separator (Red) - 2002-2014 Subaru WRX / 2004-2021 STI

    PSP-ENG-607RD

    PERRIN Air Oil Separator (Red) - 2002-2014 Subaru WRX / 2004-2021 STI

    $486.20
    GrimmSpeed Air/Oil Separator (Black) - 2002-2007 Subaru WRX / 2004-2021 Subaru STI

    23 In Stock

    078006

    GrimmSpeed Air/Oil Separator (Black) - 2002-2007 Subaru WRX / 2004-2021 Subaru STI

    $315.00
    IAG Performance V4 Air Oil Separator AOS - Red - 2022-2024 Subaru WRX

    IAG-ENG-7188RD

    IAG Performance V4 Air Oil Separator AOS - Red - 2022-2024 Subaru WRX

    $499.99
    GrimmSpeed Air Oil Separator Red - 2008-2014 Subaru WRX / 2005-2012 Subaru Legacy GT

    8 In Stock

    078016R

    GrimmSpeed Air Oil Separator Red - 2008-2014 Subaru WRX / 2005-2012 Subaru Legacy GT

    $315.00
    GrimmSpeed Air Oil Separator Black - 2008-2014 Subaru WRX / 2005-2012 Subaru Legacy GT

    14 In Stock

    078016

    GrimmSpeed Air Oil Separator Black - 2008-2014 Subaru WRX / 2005-2012 Subaru Legacy GT

    $315.00
    COBB Tuning Air Oil Separator Black/Red - 2002-2007 Subaru WRX / 2004-2007 STI

    1 In Stock

    811615

    COBB Tuning Air Oil Separator Black/Red - 2002-2007 Subaru WRX / 2004-2007 STI

    $565.00
    PERRIN Air Oil Separator Kit (Black) - 2015-2021 Subaru WRX / STI

    PSP-ENG-609BK

    PERRIN Air Oil Separator Kit (Black) - 2015-2021 Subaru WRX / STI

    $499.80
    IAG Performance Air Oil Separator AOS - Red - 2015-2021 Subaru WRX / 2014-2018 Forester XT

    IAG-ENG-7187RD

    IAG Performance Air Oil Separator AOS - Red - 2015-2021 Subaru WRX / 2014-2018 Forester XT

    $499.99
    PERRIN Air Oil Separator (Neon Yellow) - 2002-2014 Subaru WRX / 2004-2021 STI

    15 In Stock

    PSP-ENG-607NY

    PERRIN Air Oil Separator (Neon Yellow) - 2002-2014 Subaru WRX / 2004-2021 STI

    $486.20
    Verus Engineering AOS Kit - 2015-2021 Subaru WRX

    A0199A-BLK

    Verus Engineering AOS Kit - 2015-2021 Subaru WRX

    $379.95
    IAG Air Oil Separator AOS - Red - 2022-2024 Subaru WRX

    IAG-ENG-7183RD

    IAG Air Oil Separator AOS - Red - 2022-2024 Subaru WRX

    $499.99
    IAG Air Oil Separator - Neon Yellow - 2022-2024 Subaru WRX

    IAG-ENG-7183NY

    IAG Air Oil Separator - Neon Yellow - 2022-2024 Subaru WRX

    $499.99
    Radium Cruise Control Relocation Bracket - 2002-2005 Subaru WRX

    5 In Stock

    13-0110

    Radium Cruise Control Relocation Bracket - 2002-2005 Subaru WRX

    $28.45
    IAG Performance V4 Air Oil Separator AOS - Neon Yellow - 2004-2007 Subaru STI / 2006-2007 WRX

    IAG-ENG-7185NY

    IAG Performance V4 Air Oil Separator AOS - Neon Yellow - 2004-2007 Subaru STI / 2006-2007 WRX

    $499.99

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