2020–2021 Audi A5 S-Line / S5 B9 Sportback Rear Bumper Diffuser Lip – Carbon Fiber

2020–2021 Audi A5 S-Line / S5 B9 Sportback Rear Bumper Diffuser Lip – Carbon Fiber

Complete the rear-end transformation of your Audi A5 S-Line or S5 B9 Sportback with this carbon fiber rear bumper diffuser lip. Supplied as a two-piece set spanning the full lower bumper width, it adds visual width and a more aggressive lower rear appearance with a genuine carbon weave finish.

Build

Material: Genuine carbon fiber, autoclave cured using a 3D design and CNC milling 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 top coat that showcases the natural carbon weave and provides lasting UV and moisture protection through sustained outdoor and driving exposure

Configuration: Two-piece set for complete lower rear bumper coverage

Panel width & weight: 173.8 cm across · approximately 1.65 kg for the set

Design & Aerodynamics

Aggressive stance: Diffuser lip profile adds visual width and weight to the lower rear for a more commanding, track-inspired rear end

Full-width coverage: The 173.8 cm span covers the complete lower rear bumper for an integrated finish with no exposed factory sections

Carbon aesthetic: Directional weave and gloss finish complement the factory B9 Sportback bodywork for a coordinated, motorsport-grade look

Fitment