Audi A4 S-Line/S4 B9 Carbon Fibre Rear Diffuser Lip

Transform the rear end of your Audi into something genuinely commanding with this precision-engineered carbon fibre rear diffuser lip. Designed to bring an aggressive, motorsport-inspired aesthetic to the lower rear bumper, this piece instantly elevates the visual presence of your car — adding depth, drama, and a purposeful stance that turns heads at every corner.

Crafted using a 3x3 twill weave carbon fibre construction with a flawless high-gloss finish, every panel is CNC-moulded for uncompromising consistency. Each unit undergoes real-car fitment testing to ensure a seamless, gap-free integration with the factory bumper — the kind of precision finish you'd expect from a bespoke tuning studio, delivered straight to your door.

Installation is refreshingly straightforward. The diffuser ships complete with all necessary mounting hardware — adhesive tape and screws included — meaning no drilling, no modification, and no headaches. Whether you're detailing for a show or building a daily driver with track credentials, this piece slots into place with confidence.

Elevate your Audi's rear aesthetic with a part built to perform as well as it looks. Add to your build today and experience the difference that genuine carbon fibre craftsmanship makes.

Audi S4 B9 / A4 S-Line B9 (2018-2019)

3x3 Twill Weave Carbon Fibre with Gloss Clearcoat

MH Customs does not accept any liability for damage caused to a vehicle during installation of this product. Professional installation is recommended for all products. By purchasing this product you agree to these terms.