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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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    46 Results

    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

    $424.99
    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

    $424.99
    Radium AOS-R KIT T INCLUDES 20-0255 - 2015-2021 Subaru WRX / STI / 2014-2018 Forester XT

    5 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

    $424.99
    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
    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)
    $325.00
    IAG Performance Air Oil Separator AOS - Neon Yellow - 2008-2014 WRX / 2008-2021 STI / 2005-2009 Legacy GT

    IAG-ENG-7186NY

    IAG Performance Air Oil Separator AOS - Neon Yellow - 2008-2014 WRX / 2008-2021 STI / 2005-2009 Legacy GT

    $424.99
    IAG Performance V4 Air Oil Separator AOS - Black - 2022-2024 Subaru WRX

    IAG-ENG-7188BK

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

    $424.99
    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

    $325.00
    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
    Radium AOS-R Kit - 2008-2014 Subaru Subaru WRX / 2008-2021 STI / 2009-2013 Forester XT

    9 In Stock

    20-0607

    Radium AOS-R Kit - 2008-2014 Subaru Subaru WRX / 2008-2021 STI / 2009-2013 Forester XT

    $427.45
    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
    Radium Cruise Control Relocation Bracket - 2002-2005 Subaru WRX

    8 In Stock

    13-0110

    Radium Cruise Control Relocation Bracket - 2002-2005 Subaru WRX

    $28.45
    Killer B GD MV3S Air Oil Separator - 2002-2007 Subaru Impreza WRX/STi / 2004-2008 Forester XT

    GD-MV3S-C

    Killer B GD MV3S Air Oil Separator - 2002-2007 Subaru Impreza WRX/STi / 2004-2008 Forester XT

    $505.48
    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
    Verus Engineering AOS Kit - 2015-2021 Subaru WRX

    A0199A-BLK

    Verus Engineering AOS Kit - 2015-2021 Subaru WRX

    $379.95
    Verus Air Oil Separator (AOS) - Black - 2022-2024 Subaru WRX (VB)

    A0482A-BLK

    Verus Air Oil Separator (AOS) - Black - 2022-2024 Subaru WRX (VB)

    $389.95
    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
    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

    $325.00
    Killer B GR MV3S Air Oil Separator - 2008-2014 Subaru WRX / 2008-2021 STI / 2005-2009 Legacy GT / 2005-2009 Outback XT

    Killer B GR MV3S Air Oil Separator - 2008-2014 Subaru WRX / 2008-2021 STI / 2005-2009 Legacy GT / 2005-2009 Outback XT

    $505.00

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