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

    57 Results

    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
    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
    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
    Subaru OEM Rear Diffuser - 2013-2020 Subaru BRZ

    E5610CA000

    Subaru OEM Rear Diffuser - 2013-2020 Subaru BRZ

    5.0(1)
    $1,097.86
    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
    OLM Window Visor - 2022-2024 Toyota GR86 / Subaru BRZ

    40 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
    Cusco Diffuser Bracket - 2002-2007 Subaru WRX / STI

    7 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
    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
    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
    02-07 WRX / STI APR Performance Carbon Fiber Rear Diffuser

    AB-820519

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

    $855.10
    Seibon Carbon Fiber B Style Vortex Generator - 2002-2007 Subaru WRX / 2004-2007 STI

    RFS0207SBIMP-B

    Seibon Carbon Fiber B Style Vortex Generator - 2002-2007 Subaru WRX / 2004-2007 STI

    $527.00
    STI Rear Under Diffuser Black - 2022-2024 Subaru WRX

    SG517VC310

    STI Rear Under Diffuser Black - 2022-2024 Subaru WRX

    $738.14
    OLM V2 Carbon Fiber Rear Roof Spoiler - 2022-2024 Subaru WRX

    12 In Stock

    RRS-WRX22-V2-CF

    OLM V2 Carbon Fiber Rear Roof Spoiler - 2022-2024 Subaru WRX

    $269.00
    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
    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
    Verus Engineering Rear Diffuser - 2022-2024 Subaru BRZ / Toyota GR86

    A0414A

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

    $649.95
    Subaru Vortex Generator - 2022-2024 Subaru BRZ

    E751SCC000

    Subaru Vortex Generator - 2022-2024 Subaru BRZ

    $105.50

    Page 1 of 3

    Best Sellers

    06-07 WRX / 04-07 STI COBB Tuning AccessPORT V3

    67 In Stock

    AP3-SUB-002

    06-07 WRX / 04-07 STI COBB Tuning AccessPORT V3

    4.9(52)
    $735.00
    Whiteline Rear Diff Positive Power Kit Inserts - 2008-2014 Subaru WRX / STI / 2009-2013 Forester / 2010-2013 Legacy

    25 In Stock

    KDT903

    Whiteline Rear Diff Positive Power Kit Inserts - 2008-2014 Subaru WRX / STI / 2009-2013 Forester / 2010-2013 Legacy

    4.9(43)
    $72.88
    Invidia N1 Dual Exit Cat Back Exhaust - Titanium Tips - 2008-2014 Subaru STI Hatchback / 2011-2014 WRX Hatchback

    7 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
    APR Performance Carbon Fiber Alternator Cover - 2015-2021 Subaru WRX / STI / 2008-2014 Impreza

    CBE-WRXALT08

    APR Performance Carbon Fiber Alternator Cover - 2015-2021 Subaru WRX / STI / 2008-2014 Impreza

    4.1(14)
    $130.90
    PERRIN Master Cylinder Brace Red - Subaru Models (inc. 2008-2014 WRX)

    PSP-BRK-402RD

    PERRIN Master Cylinder Brace Red - Subaru Models (inc. 2008-2014 WRX)

    4.5(8)
    $147.90
    COBB Tuning Delrin Shift Knob White/Black 5MT - Subaru 5MT Models (inc. 2002-2014 WRX)

    13 In Stock

    211350-W-BK

    COBB Tuning Delrin Shift Knob White/Black 5MT - Subaru 5MT Models (inc. 2002-2014 WRX)

    4.8(6)
    $99.00
    COBB Tuning License Plate Delete - 2002-2005 Subaru WRX / STI

    5 In Stock

    812050

    COBB Tuning License Plate Delete - 2002-2005 Subaru WRX / STI

    5.0(6)
    $65.00
    Cusco Trunk Power Brace - Subaru Models (inc. 2002-2007 WRX/STi)

    3 In Stock

    672492RTLHD

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

    4.8(5)
    $204.30
    GSC Power-Division Single Beehive Valve Spring Set w/ Titanium Retainers - Subaru Models (inc. 2002-2014 WRX / 2004-2021 STI)

    5043

    GSC Power-Division Single Beehive Valve Spring Set w/ Titanium Retainers - Subaru Models (inc. 2002-2014 WRX / 2004-2021 STI)

    4.8(4)
    $479.74
    Pedders Front Right Strut - 2002-2014 Subaru WRX / 2004 STI

    4 In Stock

    PED-129055R

    Pedders Front Right Strut - 2002-2014 Subaru WRX / 2004 STI

    4.3(4)
    $134.96

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