2017-2020 Audi A4/S4 Carbon Fiber KB Style Diffuser with LED Brake Light | B9 A4/S4

*Please email us any special requests*

Transform the rear of your B9 Audi A4 or S4 with our KB Style Carbon Fiber Diffuser, complete with an integrated LED brake light for a true performance look. Designed for perfect OEM fitment and crafted from high-grade real carbon fiber, this diffuser adds aggressive styling without compromising quality or durability.

Built exclusively for quad exhaust setups, this piece is the perfect finishing touch for any performance build or visual upgrade on your 2017–2020 B9 A4 or S4.

We have been working months to get the best Carbon Fiber Diffuser from our supplier. Don't waste $700-800 and save today with ours!

This Diffuser will fit the 2017-2020 B9 Audi A4 Non S Line, A4 S Line & S4.

Specs

• Fits: 2017 2018 2019 2020 B9 Audi | A4 Non S Line | A4 S Line | S4 |
• Material: Real Carbon Fiber
• Carbon Fiber: 2x2 Carbon Fiber Weave
• Glossy UV Protectant Clear Coat
• Professional Installation Required (Bolts & 3M Tape Included)
• All Diffusers are ONLY made with Quad Exhaust cut out

Shipping

• FREE SHIPPING
• 5-8 Days Depending on Location
• We ship all of our products through UPS
• Orders will ship within 1-2 business days after payment is received. Orders from Saturdays, Sundays, or holidays will process on the next business day and will be shipped within 24 hours

We always recommend Professional Installation. 

German Car Accessories shipping & returns

• Shipping: orders typically ship within 1-2 business days; any lead time is stated on the product page.
• Returns: within 30 days of delivery, unused, in the same condition and original packaging with all contents. Installed parts and special-order items cannot be returned. Returns are handled case by case (arrived damaged, wrong item ordered, etc.).
• Shipping costs are non-refundable. Customers pay import duties and taxes on international orders.

To start a return or ask a question, contact us with your order number.