Most orders are shipped in 1-2 business days and arrive in 3-5 business days.

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Please note that we have revised the design of this diffuser, as the pictures are of our older design, which is very similar but there are some differences.


Enhance the look of your Audi with the CAP Carbon Fiber Diffuser. Made with high quality carbon fiber, this diffuser will enhance the sporty look of your Audi will still remaining elegant.

Comes with a functional middle brake light.

Fits 2010 - 2012 B8 Audi S4 & B8 Audi A4 S-Line.

Brake Light Wiring:
Red is the live wire.
Black is the ground wire.
Yellow is the brake light wire.

Professional install highly recommended.

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