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
    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
    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
    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
    Seibon Carbon Fiber Rear Diffuser - 2020-2024 Toyota Supra

    RD20TYSUP

    Seibon Carbon Fiber Rear Diffuser - 2020-2024 Toyota Supra

    $1,260.00
    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
    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
    OLM OEM+ Style Rear Diffuser - 2013-2016 Scion FR-S / Subaru BRZ

    RDF-FT86-T3-CL

    OLM OEM+ Style Rear Diffuser - 2013-2016 Scion FR-S / Subaru BRZ

    $189.00
    02-07 WRX / STI APR Performance Carbon Fiber Rear Diffuser

    AB-820519

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

    $855.10
    03-06 Mitsubishi Lancer APR Performance Carbon Fiber Rear Diffuser

    AB-485019

    03-06 Mitsubishi Lancer APR Performance Carbon Fiber Rear Diffuser

    $898.50
    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

    Page 1 of 4

    Best Sellers

    Company23 Cam Lock Tool - Subaru Models (inc. 2002-2014 WRX / 2004-2021 STI)

    506

    Company23 Cam Lock Tool - Subaru Models (inc. 2002-2014 WRX / 2004-2021 STI)

    4.8(54)
    $49.95
    Invidia N1 Dual Exit Cat Back Exhaust - Titanium Tips - 2008-2014 Subaru STI Hatchback / 2011-2014 WRX Hatchback

    10 In Stock

    HS08STIGTT

    Invidia N1 Dual Exit Cat Back Exhaust - Titanium Tips - 2008-2014 Subaru STI Hatchback / 2011-2014 WRX Hatchback

    4.8(33)
    $1,308.30
    Invidia Q300 Quad Tipped Cat Back Exhaust - Stainless Tips - 2011-2014 Subaru WRX/STI Sedan

    HS11STIG3S

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

    4.5(31)
    $1,736.56
    GrimmSpeed Gates Stretch Belt Pulley Adapter - 2008-2014 Subaru WRX / 2004-2021 STI

    10 In Stock

    095012

    GrimmSpeed Gates Stretch Belt Pulley Adapter - 2008-2014 Subaru WRX / 2004-2021 STI

    4.4(10)
    $16.00
    Subaru OEM Oil Filter - 2015-2024 Subaru WRX

    15208AA170

    Subaru OEM Oil Filter - 2015-2024 Subaru WRX

    5.0(8)
    $10.25
    Proto License Plate Camera Mount for use with GoPro Cameras - Universal

    12 In Stock

    GPM1001-BLK

    Proto License Plate Camera Mount for use with GoPro Cameras - Universal

    4.4(7)
    $19.99
    IAG Power Steering Line OEM Routing - 2002-2007 Subaru WRX / STI

    IAG-ENG-5900

    IAG Power Steering Line OEM Routing - 2002-2007 Subaru WRX / STI

    4.7(6)
    $129.99
    PERRIN Air Oil Separator Red Stock TMIC - 2002-2007 Subaru WRX / STI

    3 In Stock

    PSP-ENG-605RD

    PERRIN Air Oil Separator Red Stock TMIC - 2002-2007 Subaru WRX / STI

    4.2(6)
    $622.13
    Injen Cold Air Intake Wrinkle Red - 2006-2007 Subaru WRX / 2004-2007 STI

    SP1202WR

    Injen Cold Air Intake Wrinkle Red - 2006-2007 Subaru WRX / 2004-2007 STI

    4.4(5)
    $409.76
    Verus Engineering Bell Housing Cover - Subaru 2004-2021 STI / 2002-2014 WRX / 2003-2006 Baja / 1998-2013 Forester / 1993-2014 Impreza / 1990-2013 Legacy / 2000-2011 Outback

    1 In Stock

    A0102A

    Verus Engineering Bell Housing Cover - Subaru 2004-2021 STI / 2002-2014 WRX / 2003-2006 Baja / 1998-2013 Forester / 1993-2014 Impreza / 1990-2013 Legacy / 2000-2011 Outback

    5.0(4)
    $39.95

    110% Price Match Guarantee*

    Find the same product for less on any competitor's site, and we'll match that price and beat if by 10% of the difference!* 

    Free Shipping*

    Free shipping is available within the lower 48 states for orders totalling $199 or more. Simply select the free shipping option during checkout.
    *Exclusions apply

    30 Day, 100% Satisfaction

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.