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

    5 In Stock

    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)
    $79.00
    STI JDM Rear Diffuser - 2002-2007 Subaru WRX / STI

    ST91225FE000

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

    4.9(17)
    $84.61
    Cusco Diffuser Bracket - 2002-2007 Subaru WRX / STI

    672487S

    Cusco Diffuser Bracket - 2002-2007 Subaru WRX / STI

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

    5 In Stock

    901000000

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

    5.0(10)
    $1.97
    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)
    $164.95
    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
    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
    Subaru OEM Rear Diffuser - 2013-2020 Subaru BRZ

    E5610CA000

    Subaru OEM Rear Diffuser - 2013-2020 Subaru BRZ

    5.0(1)
    $891.49
    OLM Window Visor - 2022-2024 Toyota GR86 / Subaru BRZ

    42 In Stock

    RRV-GR8622-V1

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

    4.0(1)
    $119.00
    Seibon Carbon Fiber OE-Style Rear Diffuser - 2016-2018 Ford Focus RS

    RD16FDFO-OE

    Seibon Carbon Fiber OE-Style Rear Diffuser - 2016-2018 Ford Focus RS

    $1,080.00
    Subaru Vortex Genterator - 2018-2021 Subaru WRX / 2017-2021 STI w/ Starlink

    E751SVA010

    Subaru Vortex Genterator - 2018-2021 Subaru WRX / 2017-2021 STI w/ Starlink

    $99.95
    STI JDM Rear Diffuser - 2015-2021 Subaru WRX / STI

    SG517VA350

    STI JDM Rear Diffuser - 2015-2021 Subaru WRX / STI

    $668.04
    Maxton Design Rear Window Vortex Generator - 2015-2021 Subaru WRX / STI

    15 In Stock

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

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

    $139.95
    02-07 WRX / STI APR Performance Carbon Fiber Rear Diffuser

    AB-820519

    02-07 WRX / STI APR Performance Carbon Fiber Rear Diffuser

    $855.10
    STI Rear Under Diffuser Black - 2022-2024 Subaru WRX

    SG517VC310

    STI Rear Under Diffuser Black - 2022-2024 Subaru WRX

    $738.14
    OLM V2 Rear Window Visor - 2015-2021 Subaru WRX / STI

    RRV-WRX14-V2

    OLM V2 Rear Window Visor - 2015-2021 Subaru WRX / STI

    $119.95
    Verus Engineering Non-Aggressive Rear Diffuser - 2015-2021 Subaru WRX / STI

    A0025A

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

    $749.95

    Page 1 of 4

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