Carbon Fiber Rear Diffuser - Audi A4 S4 RS4 Sedan (2020-2025) B9.5

Redefine the rear aesthetics of your facelifted Audi A4/S4/RS4 B9.5 Sedan with this precision-engineered Carbon Fiber Rear Diffuser. Designed as a direct replacement for the factory lower bumper section, this component introduces an aggressive, multi-fin design that enhances the vehicle's visual width and creates a commanding, performance-focused stance. The sophisticated carbon fiber weave and precisely arranged fins provide a track-inspired aesthetic that elevates your vehicle's rear profile while maintaining perfect OEM-like integration with the updated B9.5 bumper.

Meticulously crafted from premium 2x2 twill carbon fiber, this diffuser showcases a flawless weave pattern protected by a high-gloss UV-resistant clear coat. The carbon fiber construction offers significant weight reduction over the stock plastic component while providing superior durability and a striking visual impact. This direct replacement unit arrives as a finished piece, requiring no painting before professional installation.

Key Features

• Fits Audi A4, S4, RS4 B9.5 Sedan (2020-2025)

• Aggressive multi-fin design for enhanced width and performance appearance

• Premium 2x2 twill carbon fiber construction – flawless finish and reduced weight

• Direct OEM replacement – supplied with high-gloss clear coat, no painting required

Production & Lead Time
Each rear diffuser is made to order, with a lead time of 2–6 weeks.

Lifetime Warranty
Includes a lifetime warranty against manufacturing defects, valid only when installed by AR Bodyworks.

Vehicle Fitment

• Audi A4, S4, RS4 B9.5 Sedan (2020-2025)