See only parts compatible with your vehicle

    Diffusers and Vortex Generators

    RallySport Direct carries a great selection of diffusers and vortex generators to allow users to add or supplement the aerodynamics of their vehicles. Vortex Generators are designed to provide vehicles equipped with a rear spoiler with optimal downforce and wind deflection. Rear Diffusers will allow almost create a vacuum under the car which sucks the vehicle further to the ground which creates more downforce. On rear diffusers, you will see fins on the back, and they are designed to keep the air moving in a linear way to reduce turbulence and keeps the air flowing evenly. 

    Both work together greatly and will work great for those who drive something that comes factory with a rear wing such as a Subaru STI, or Mitsubishi Evolution. RallySport Direct carries rear diffusers for the Subaru WRX/STI and BRZ, and we carry Vortex Generators for the Mitsubishi Evolution and the Subaru WRX STI. 

    Choose from many great brands which include the likes of APR, STI, Cusco, Subaru OEM, and Beatrush.

    Make sure you check out the rest of our exterior additions to improve your aerodynamics which include Spoilers and Wings, Front Wind Splitters, as well as side skirts. 

    Shop featured products

    62 Results

    Subaru OEM Vortex Generator Sedan - 2008-2014 Subaru WRX / STI Sedan

    E751SFG300

    Subaru OEM Vortex Generator Sedan - 2008-2014 Subaru WRX / STI Sedan

    4.8(28)
    $79.00
    Subaru OEM Vortex Generator - 2015-2021 Subaru WRX / STI

    E751SVA000

    Subaru OEM Vortex Generator - 2015-2021 Subaru WRX / STI

    4.8(12)
    $96.00
    Cusco Diffuser Bracket - 2002-2007 Subaru WRX / STI

    6 In Stock

    672487S

    Cusco Diffuser Bracket - 2002-2007 Subaru WRX / STI

    5.0(13)
    $45.90
    STI Diffuser Bolt - Subaru Models (inc. 2004-2021 WRX / 2000-2020 Legacy)

    2 In Stock

    901000000

    STI Diffuser Bolt - Subaru Models (inc. 2004-2021 WRX / 2000-2020 Legacy)

    5.0(10)
    $2.46
    STI JDM Rear Diffuser - 2002-2007 Subaru WRX / STI

    ST91225FE000

    STI JDM Rear Diffuser - 2002-2007 Subaru WRX / STI

    4.9(17)
    $84.61
    Maxton Design Rear Window Vortex Generator - 2013-2021 Scion FR-S / Subaru BRZ / Toyota 86

    7 In Stock

    TO-GT86-1F-H1G

    Maxton Design Rear Window Vortex Generator - 2013-2021 Scion FR-S / Subaru BRZ / Toyota 86

    5.0(1)
    $146.77
    Subaru OEM Rear Diffuser - 2013-2020 Subaru BRZ

    E5610CA000

    Subaru OEM Rear Diffuser - 2013-2020 Subaru BRZ

    5.0(1)
    $1,097.86
    APR Performance Carbon Fiber Vortex Generator - 2017-2021 Subaru WRX / STI

    CF-818012

    APR Performance Carbon Fiber Vortex Generator - 2017-2021 Subaru WRX / STI

    5.0(1)
    $406.30
    Verus Engineering Rear Diffuser - 2008-2014 Subaru STI Hatchback / 2011-2014 WRX Hatchback

    A0148A

    Verus Engineering Rear Diffuser - 2008-2014 Subaru STI Hatchback / 2011-2014 WRX Hatchback

    5.0(2)
    $639.95
    GCS S Style Rear Diffuser Carbon Fiber - 2015-2021 Subaru WRX / STI

    3 In Stock

    RDF-WRX14-STI-CF

    GCS S Style Rear Diffuser Carbon Fiber - 2015-2021 Subaru WRX / STI

    4.5(2)
    $1,209.83
    OLM Window Visor - 2022-2024 Toyota GR86 / Subaru BRZ

    39 In Stock

    RRV-GR8622-V1

    OLM Window Visor - 2022-2024 Toyota GR86 / Subaru BRZ

    4.0(1)
    $119.00
    Verus Engineering Aggressive Rear Diffuser - 2015-2021 Subaru WRX / STI

    A0028A

    Verus Engineering Aggressive Rear Diffuser - 2015-2021 Subaru WRX / STI

    4.0(1)
    $749.95
    Maxton Design Rear Window Vortex Generator - 2015-2021 Subaru WRX / STI

    13 In Stock

    SU-IM-4-WRX-STI-H1-GB

    Maxton Design Rear Window Vortex Generator - 2015-2021 Subaru WRX / STI

    $86.84
    Verus Engineering Rear Diffuser - 2022-2024 Subaru BRZ / Toyota GR86

    A0414A

    Verus Engineering Rear Diffuser - 2022-2024 Subaru BRZ / Toyota GR86

    $649.95
    Maxton Design Vortex Generator - 2020-2024 Toyota Supra

    8 In Stock

    TO-SU-5-H1G

    Maxton Design Vortex Generator - 2020-2024 Toyota Supra

    $104.95
    03-06 Mitsubishi Lancer APR Performance Carbon Fiber Rear Diffuser

    AB-485019

    03-06 Mitsubishi Lancer APR Performance Carbon Fiber Rear Diffuser

    $898.50
    Verus Engineering Rear Diffuser MKV Toyota Supra - 2020-2024 Toyota Supra

    A0220A

    Verus Engineering Rear Diffuser MKV Toyota Supra - 2020-2024 Toyota Supra

    $679.95
    Seibon Carbon Fiber Rear Diffuser - 2020-2024 Toyota Supra

    RD20TYSUP

    Seibon Carbon Fiber Rear Diffuser - 2020-2024 Toyota Supra

    $1,260.00
    Seibon MB Style Carbon Fiber Rear Diffuser - 2020-2024 Toyota Supra

    RD20TYSUP-MB

    Seibon MB Style Carbon Fiber Rear Diffuser - 2020-2024 Toyota Supra

    $1,485.00
    OLM Carbon Fiber Rear Diffuser - 2015-2021 Subaru WRX / STI

    11 In Stock

    ST437

    OLM Carbon Fiber Rear Diffuser - 2015-2021 Subaru WRX / STI

    $749.00

    Page 1 of 4

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    Invidia Q300 Quad Tipped Cat Back Exhaust - Stainless Tips - 2011-2014 Subaru WRX/STI Sedan

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    Kartboy Shifter Bushing Combo - Subaru 5MT Models (inc. 2002-2014 WRX)

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    Subaru OEM Cabin Filter - 2008-2021 Subaru STI / WRX / 2008-2014 Forester

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    Subaru OEM Cabin Filter - 2008-2021 Subaru STI / WRX / 2008-2014 Forester

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    ARP Fasteners Head Stud Kit 11mm - Subaru Models (inc. 2002-2014 WRX / 2004-2021 STI)

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    ARP Fasteners Head Stud Kit 11mm - Subaru Models (inc. 2002-2014 WRX / 2004-2021 STI)

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    AEM Electronics E85 Fuel Pump 340lph - Universal

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    AEM Electronics E85 Fuel Pump 340lph - Universal

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    ACT Xtreme Duty 6-Puck Disc Clutch Kit - 2004-2021 Subaru STI / 2007-2009 Legacy GT spec.B

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    ACT Xtreme Duty 6-Puck Disc Clutch Kit - 2004-2021 Subaru STI / 2007-2009 Legacy GT spec.B

    4.4(5)
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    Cusco Trunk Power Brace - Subaru Models (inc. 2002-2007 WRX/STi)

    1 In Stock

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    Cusco Trunk Power Brace - Subaru Models (inc. 2002-2007 WRX/STi)

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    $204.30
    Aeromotive Fuel Pressure Gauge - Universal

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    Aeromotive Fuel Pressure Gauge - Universal

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    Subaru OEM Cabin Filter - 2002-2007 Subaru WRX / STI

    G3010FE200

    Subaru OEM Cabin Filter - 2002-2007 Subaru WRX / STI

    5.0(4)
    $25.00
    Rally Armor UR Mudflaps Black Urethane White Logo - 2010-2013 Mazdaspeed3

    1 In Stock

    RAL MF17-UR-BLK/WH

    Rally Armor UR Mudflaps Black Urethane White Logo - 2010-2013 Mazdaspeed3

    5.0(4)
    $143.00

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