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Audi Rear Diffusers

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  • In Stock

    2018-2019 Audi A5/S5 Carbon Fiber KB Style Diffuser with LED Brake Light | B9 A5/S5

    *Please email us any special requests* Give your Audi A5/S5 a face lift with the Carbon Fiber KB Style Diffuser with LED Brake Light from us! Perfect fitment and High quality this Diffuser...

    (1)

    $699.99
    $699.99
  • In Stock

    2014-2016 Audi A3/S3 Carbon Fiber Diffuser with LED Brake Light | 8V A3/S3

        *Please email us any special requests* Transform the rear end of your Audi A3 or S3 with this track-inspired Carbon Fiber Rear Diffuser, designed specifically for...

    (2)

    $699.99
    $699.99
  • In Stock

    2012-2015 Audi A6/S6 Carbon Fiber KB Style Diffuser with LED Brake Light | C7 A6/S6

        *Please email us any special requests* Upgrade the rear end of your Audi A6 or S6 with our KB Style Carbon Fiber Rear Diffuser, complete with...

    (2)

    $699.99
    $699.99
  • In Stock

    2013-2016 Audi A4/S4 Carbon Fiber KB Style Diffuser with LED Brake Light | B8.5 A4/S4

        *Please email us any special requests* Give your Audi S4 or A4 (B8.5) the rear-end upgrade it deserves with our KB Style Carbon Fiber Rear Diffuser,...

    (3)

    $699.99
    $699.99
  • In Stock

    2017-2020 Audi A4/S4 Carbon Fiber Aggressive KB Style Diffuser with LED Brake Light | B9 A4/S4

        *Please email us any special requests* Upgrade the rear end of your B9 A4 or S4 with our Carbon Fiber KB Style Diffuser, featuring an integrated...

    $699.99
    $699.99
  • In Stock

    2012-2015 Audi A7/S7 Carbon Fiber KB Style Diffuser with LED Brake Light | C7 A7/S7

        *Please email us any special requests* Transform the rear end of your Audi A7 or S7 with our Carbon Fiber KB Style Diffuser, complete with an...

    (2)

    $699.99
    $699.99
  • In Stock

    2016-2018 Audi A7/S7 Carbon Fiber Diffuser with LED Brake Light | C7.5 A7/S7

        *Please email us any special requests* Upgrade the rear profile of your Audi with this Carbon Fiber Diffuser with Integrated LED Brake Light - the perfect...

    $729.99
    $729.99
  • In Stock

    2016-2018 Audi A6/S6 Carbon Fiber Aggressive KB Style Diffuser with LED Brake Light | C7.5 A6/S6

    *Please email us any special requests* Give your Audi A6/S6 a face lift with the Carbon Fiber Aggressive KB Style Diffuser with LED Brake Light from us! Perfect fitment and High quality this Diffuser...

    (1)

    $729.99
    $729.99
  • In Stock

    2017-2020 Audi A3/S3 Carbon Fiber KB Style Diffuser | 8V.5 A3/S3

        *Please email us any special requests* Transform the rear end of your 2017-2020 Audi S3 with our KB Style Carbon Fiber Rear Diffuser. Designed specifically for...

    (1)

    $679.99
    $679.99
  • In Stock

    2009-2012 Audi A4/S4 Carbon Fiber Diffuser with LED Brake Light | B8 A4/S4

        *Please email us any special requests* Transform the rear end of your Audi A4 or S4 with our Carbon Fiber Diffuser featuring an integrated LED brake...

    (3)

    $699.99
    $699.99
  • In Stock

    2020+ Audi A5/S5 Carbon Fiber Rear Diffuser with LED Brake Light | B9.5 A5/S5

        *Please email us any special requests* Give your Audi A5/S5 a face lift with the Carbon Fiber Rear Diffuser from us! Perfect fitment and High quality this Rear Diffuser will...

    $899.99
    $899.99
  • In Stock

    2019+ Audi A6/S6 Carbon Fiber Aggressive KB Style Diffuser with LED Brake Light | C8 A6/S6

      *Please email us any special requests* Transform the rear end of your Audi A6 or S6 with our Aggressive KB Style Carbon Fiber Diffuser, complete with an...

    $729.99
    $729.99
  • In Stock

    2017-2020 Audi A4/S4 Carbon Fiber KB Style Diffuser with LED Brake Light | B9 A4/S4

        *Please email us any special requests* Transform the rear of your B9 Audi A4 or S4 with our KB Style Carbon Fiber Diffuser, complete with an...

    $699.99
    $699.99
  • In Stock

    2017-2020 Audi A3/S3 Carbon Fiber Diffuser | 8V.5 A3/S3

        *Please email us any special requests* Transform the rear of your 2017-2020 Audi A3 or S3 with our Carbon Fiber Rear Diffuser. Designed specifically for the...

    $629.99
    $629.99
  • In Stock

    2016-2018 Audi A6/S6 Carbon Fiber KB Style Diffuser with LED Brake Light | C7.5 A6/S6

    *Please email us any special requests* Give your Audi A6/S6 a face lift with the Carbon Fiber KB Style Diffuser with LED Brake Light from us! Perfect fitment and High quality this Diffuser will...

    $729.99
    $729.99
  • In Stock

    2008-2012 Audi A5/S5 Carbon Fiber Diffuser with LED Brake Light | B8 A5/S5

    *Please email us any special requests* Give your Audi A5/S5 a face lift with the Carbon Fiber Diffuser with LED Brake Light from us! Perfect fitment and High quality this Diffuser will...

    $769.99
    $769.99
  • In Stock

    2017-2020 Audi A3/S3 Carbon Fiber KB Style Diffuser with LED Brake Light | 8V.5 A3/S3

        *Please email us any special requests* Upgrade your Audi S3 with our KB Style Carbon Fiber Rear Diffuser, now with an integrated LED brake light for...

    $749.99
    $749.99
  • In Stock

    2020+ Audi S4 Carbon Fiber KB Style Rear Diffuser with LED Brake Light | B9.5 S4

      *Please email us any special requests* Upgrade the rear end of your B9.5 Audi S4 with our Carbon Fiber KB Style Rear Diffuser - complete with integrated...

    $949.99
    $949.99
  • In Stock

    2013-2017 Audi A5/S5 Carbon Fiber Diffuser with LED Brake Light | B8.5 A5/S5

    *Please email us any special requests* Give your Audi A5/S5 a face lift with the Carbon Fiber Diffuser with LED Brake Light from us! Perfect fitment and High quality this Diffuser will...

    (3)

    $789.99
    $789.99
  • In Stock

    2017-2020 Audi A3 Carbon Fiber Diffuser | 8V.5 A3

        *Please email us any special requests* Refresh the rear profile of your 2017-2020 Audi A3 (Non S Line) with our premium Carbon Fiber Rear Diffuser. Purpose-built...

    $629.99
    $629.99
  • In Stock

    2017-2020 Audi A3 Carbon Fiber KB Style Diffuser with LED Brake Light | 8V.5 A3

        *Please email us any special requests* Add a bold rear-end upgrade to your 2017-2020 Audi A3 Non S Line with our Carbon Fiber KB Style Diffuser...

    $749.99
    $749.99
  • In Stock

    2009-2012 Audi A4 Carbon Fiber KB Style Diffuser with LED Brake Light | B8 A4

    *Please email us any special requests* Give your Audi A4 a face lift with the Carbon Fiber KB Style Diffuser with LED Brake Light from us! Perfect fitment and High quality...

    (1)

    $699.99
    $699.99
  • In Stock

    2020+ Audi A4 Carbon Fiber Rear Diffuser with LED Brake Light | B9.5 A4

        *Please email us any special requests* Give your Audi A4 a face lift with the Carbon Fiber KB Style Rear Diffuser from us! Perfect fitment and...

    (2)

    $999.99
    $999.99
  • In Stock

    2008-2012 Audi A5 Carbon Fiber Diffuser | B8 A5

        *Please email us any special requests* Upgrade the rear end of your Audi A5 with our Carbon Fiber Rear Diffuser - designed to bring aggressive styling...

    $649.99
    $649.99

Why Upgrade Your Audi Rear Diffuser?

Upgrading your Audi rear diffuser is one of the most impactful changes you can make to the rear end of your car. Whether you're chasing a cleaner OEM+ look or a more aggressive, track-inspired setup, a diffuser helps tie together your car’s styling and makes the back end look complete.

But more than just the looks, rear diffusers also manage airflow beneath your car to reduce drag and improve stability - especially at higher speeds. It’s a subtle aerodynamic upgrade, but the real win is in the road presence it brings.

Built to Fit, Designed to Stand Out

All of our Audi diffusers are designed for precise fitment across a wide range of models. That means no awkward gaps, misalignments or flimsy mounting. Whether you’re driving an A3, S4 or RS5, our diffuser options are designed to bolt into your factory locations or clip on with minimal fuss.

You’ll find a variety of materials and styles to choose from:

  • Gloss black ABS plastic for a sleek, stealth look
  • Carbon fiber rear diffusers for that raw motorsport feel
  • Cutouts for quad tips or brake lights for enhanced styling

Styling Options to Match Any Build

Not every Audi needs the most aggressive diffuser on the market, sometimes a more subtle OEM+ option is the better move. But no matter your build style, or your car model or year, there’s a diffuser to match:

  • Subtle designs that clean up the rear end without going overboard
  • Aggressive fins and sharp lines for a performance look
  • Compatibility with quad tip exhaust systems or integrated LED brake lights

Many of our customers like to match their diffuser with a spoiler and valved exhaust to give their rear end a complete, balanced look.

Rear Diffusers for a Wide Range of Audi Models

We stock rear diffusers for a variety of Audi models including:

  • Audi A3 / S3 / RS3 (8V, 8Y)
  • Audi A4 / S4 / RS4 (B8, B9)
  • Audi A5 / S5 / RS5
  • Audi A6, A7 and more

Both facelift and pre-facelift options are available. If you’re not sure what fits your car, just use the search bar above or browse your specific model/year collection.

Complete the Look With Other Exterior Mods

While rear diffusers offer one of the biggest styling upgrades for the rear of your Audi, they work even better when combined with other mods. For a cohesive, aggressive look, pair your new diffuser with:

Together, they’ll transform your Audi’s presence and make your build look properly thought out. 

Search by Year, Make and Model