Audi A4 Rear Diffusers
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In Stock2013-2016 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,...
$699.99$699.99 -
Best Seller
In Stock2017-2020 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 Stock2009-2012 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...
$699.99$699.99 -
In Stock2017-2020 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 Stock2009-2012 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...
$699.99$699.99 -
In Stock2020+ 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...
$999.99$999.99
Audi A4 Rear Diffusers
Our Audi A4 rear diffusers (compatible with B8, B8.5, and B9 models) feature a wide range of styling options from the custom OEM builds to complete RS-inspired multi-fin variations to give your car the sporty look you want.
For a car that might be considered a bit more ‘basic’, a rear diffuser can really shape up your rear end and give you the unique look you’ve been looking for.
We have a variety of options you can select from:
- Gloss back ABS diffusers: Gives you a sleeker OEM appearance.
- Carbon fibre diffusers: Gives your car that exotic touch that separates it from others on the road.
- Quad-tip cutout diffusers: Perfect match for upgraded exhaust systems.
- LED brake light integration: Brings together your entire back end with included LED brake lights.
Why Upgrade the Rear Diffuser?
Whether you’re upgrading to give your car more definition and symmetry, or for aerodynamic reasons (balance and managing airflow under the car), a diffuser is definitely money well spent. With our collection of diffusers equipped with factory mounting points, installation comes with no hassle at all, making this the perfect upgrade to visually enhance the look of your Audi A4.