Audi A4 S-Line / S4 B9.5 Carbon Fibre Rear Diffuser

Transform the rear end of your Audi A4 with this precision-engineered carbon fibre rear diffuser, designed to deliver a commanding, track-inspired aesthetic that sets your build apart from the factory standard. The aggressive underbody styling elevates the visual drama of the car's rear quarter, lending it the purposeful stance of a true performance machine.

Crafted from dry carbon fibre and shaped using CNC-precision moulds, each diffuser is a testament to the exacting standards that define serious automotive tuning. The hand-laid construction ensures a flawless, uniform weave pattern across the entire surface, finished with a lustrous clearcoat that catches light with every angle.

Installation is straightforward and stress-free — the package includes all necessary mounting hardware, allowing for a clean, no-modification fit that looks and feels completely factory-integrated. There is no need for drilling, cutting, or specialist tools, making this one of the most rewarding upgrades you can bolt onto your car.

Whether you're building a show car or simply want to inject some motorsport character into your daily driver, this rear diffuser is the perfect finishing touch. Upgrade your rear end today and experience the transformation firsthand.

Audi A4 / S4 B9.5 (2020-2021)

Dry Carbon Fibre, 3x3 Twill Weave with Gloss Clearcoat

Vanté ships worldwide. All international orders include DDP shipping (Delivered Duty Paid) — no import duties, customs fees, or unexpected charges on delivery. What you pay at checkout is what you pay, wherever you are. A small number of products are exempt from this; please contact us if in doubt.

Delivery estimates

Estimated delivery dates are shown on each product page and reflect the full manufacturing and shipping timeline. These are accurate to each product type and updated regularly.

Manufactured to order

The majority of our catalogue is produced to order. This ensures every component is made fresh to specification. Delivery estimates on each product page account for this production time in full.

Express shipping

Express shipping is available on selected products and will appear as an option at checkout where applicable.

Stock availability

Occasionally items may be available for faster dispatch from existing stock. If you need a part urgently, reach out before ordering and we'll confirm availability.

Vanté Automotive 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.