Transform the rear appearance of your Audi A4/S4 B9 Sedan with this precision-engineered Carbon Fiber Rear Diffuser. Designed as a direct replacement for the factory lower bumper section, this diffuser introduces an aggressive, multi-fin design that enhances the vehicle's width and creates a commanding, performance-focused stance. The sophisticated carbon fiber weave and intricate fin pattern provide a track-inspired aesthetic that elevates your vehicle's rear profile while maintaining perfect OEM-like integration with your factory bumper.
Expertly 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 B9 Sedan (2015-2020)
• 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.
Exclusive In-House Installation
Installation only by AR Bodyworks to ensure precise fitment and a flawless finish. This product is not available for self-installation or third-party fitting.
Lifetime Warranty
Includes a lifetime warranty against manufacturing defects, valid only when installed by AR Bodyworks.
Vehicle Fitment
• Audi A4, S4 B9 Sedan (2015-2020)
Note: Warranty is void if modified or installed outside AR Bodyworks.
Transform the rear appearance of your Audi A4/S4 B9 Sedan with this precision-engineered Carbon Fiber Rear Diffuser. Designed as a direct replacement for the factory lower bumper section, this diffuser introduces an aggressive, multi-fin design that enhances the vehicle's width and creates a commanding, performance-focused stance. The sophisticated carbon fiber weave and intricate fin pattern provide a track-inspired aesthetic that elevates your vehicle's rear profile while maintaining perfect OEM-like integration with your factory bumper.
Expertly 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 B9 Sedan (2015-2020)
• 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.
Exclusive In-House Installation
Installation only by AR Bodyworks to ensure precise fitment and a flawless finish. This product is not available for self-installation or third-party fitting.
Lifetime Warranty
Includes a lifetime warranty against manufacturing defects, valid only when installed by AR Bodyworks.
Vehicle Fitment
• Audi A4, S4 B9 Sedan (2015-2020)
Note: Warranty is void if modified or installed outside AR Bodyworks.
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