2013-2016 B8.5 Audi A4/S4 - CAP Carbon Fiber Rear Diffuser - V1

B8.5 S4 Diffuser | Made Of Carbon Fiber Diffuser |Fits B8.5 Audi A4/S4

Enhance the look of your Audi with the B8.5 Audi A4 S-Line/S4 CAP Carbon Fiber Diffuser V1. Made with high quality carbon fiber, this diffuser will enhance the sporty look of your Audi while still remaining elegant. This diffuser is crafted of high quality hand laid carbon fiber.

Give Your 2013-2016 Audi A4/S4 The Agressive Rear End With Our Carbon Fiber Diffuser

The B8.5 A4/S4 platform looks very aggressive when paired with an upgraded rear bumper. Here at Canadian Auto Performance, we make sure to bring the highest-quality diffusers, making your Audi's as special as they can be!

Don't forget to tag us on Instagram and use the hashtag #b8.5 s4 diffuser and #b8.5 s4 rear diffuser to get featured on our page!

Pick Between 2 Variants

The B8.5 A4 S-Line, S4 CAP Carbon Diffuser has two styles to choose from - one with a functional LED and one without an LED.

Make sure you compliment your new CAP carbon diffuser with one of three CAP carbon fiber trunk spoilers available. 

Wiring Instructions:

The LED light has been refreshed to a newer design.

Red is the live wire.
Black is the ground wire.
Yellow is the brake light wire.

Install Instructions Disclaimer:

Professional install of this carbon diffuser by someone who has aftermarket product experience is required.
Rear bumper must be removed to install this carbon fiber diffuser properly.

Please note, you must choose the appropriate variant of the diffuser to fit your car, if your car. B8.5 Audi A4 S-Line & S4 have same fitment. B8.5 Audi A4 non S-Line has a different diffuser fitment.