2008–2016 Audi A5 / S5 8T Coupe & Sportback Rear Bumper Diffuser Lip – Carbon Fiber

Enhance the lower rear profile of your Audi A5 or S5 8T with this carbon fiber rear bumper diffuser lip. Finished in high-gloss carbon black and spanning 145 cm across the lower bumper, it adds width and visual aggression for a more planted, performance-oriented rear stance.

Build

• Material: Genuine carbon fiber, autoclave cured and vacuum moulded using a 3D design and CNC moulding process for precise diffuser geometry, consistent panel quality, and an authentic weave appearance over carbon-look ABS or fiberglass alternatives
• Surface finish: High-gloss epoxy-polished finish in carbon black that showcases the natural carbon weave and resists UV exposure, moisture, and road debris through sustained outdoor and driving use
• Configuration: Single-piece diffuser lip for the lower rear bumper
• Panel width: 145 cm across

Design & Aerodynamics

• Aggressive stance: Diffuser lip profile adds width and visual weight to the lower rear for a more planted, track-inspired rear end
• Full-width coverage: The 145 cm span covers the lower rear bumper for an integrated finish with no exposed factory sections
• Carbon aesthetic: Directional weave and gloss carbon black finish complement the factory 8T bodywork for a coordinated, motorsport-grade look

Fitment

• 2008–2016 Audi A5 8T — Coupe and Sportback
• 2008–2016 Audi S5 8T — Coupe and Sportback
• Fits the factory rear bumper only — not compatible with aftermarket or non-8T bumper configurations
• Confirm your body style and rear bumper configuration before ordering — check the shape against the product images, as the 8T received a facelift that changed rear bumper detailing

Package Contents

• 1 × carbon fiber rear bumper diffuser lip
• Adhesive tape for installation
• Mounting screws for installation

Installation

• Two mounting options: Fit with the included adhesive tape for a reversible install, or with the included screws for a more permanent, secure fitment
• Surface prep: If using adhesive tape, thoroughly clean, degrease, and dry the rear bumper before fitting to ensure maximum adhesion
• Alignment: Dry-fit and check the diffuser sits centred and even across the bumper before committing to either method
• Professional installation recommended for correct positioning, panel alignment, and a clean finish — particularly if using the screw-mount option

Before You Install

• Verify your rear bumper shape against the product images before ordering — check whether your car is pre-facelift or facelift, as the lower bumper detailing differs
• Screw mounting is permanent — it requires drilling into the bumper, so decide on your method and confirm placement before starting
• Take care when parking rear-in — lower rear panels sit close to kerbs and parking blocks
• Adhesive installation is reversible, but removal and re-prep may be required if the diffuser needs repositioning