ECS Tuning-Audi

If you want to add an aggressive appearance to the rear of your B8.5 S4, look no further. Our in house engineered carbon fiber diffuser is aggressive while still maintaining a factory appeal. The diffuser is crafted of high quality, hand laid carbon fiber to achieve it's world class appearance and durability. Which will have you hooked sparking a whole new love for the rear of your vehicle.

This diffuser installs with no modification of any kind required. Simply remove your currently installed valance and install the diffuser using the factory mounting locations and hardware.



Track inspired aerodynamics

Click HERE to order or for more information


Let me know if you have any questions.

Jason