Overview
Give your AUDI A4 B8 S4 Sedan Wagon a cleaner, more purposeful rear exit with this rear diffuser. The Extreme Lightweight and Durable Carbon Fiber Construction option delivers a high-impact appearance upgrade grounded in the facts listed for this product.
Built with Extreme Lightweight and Durable Carbon Fiber Construction; options include Strong Carbon Fiber Construction; Glossy Clear Coated.
Fitment
- Designed for AUDI A4 B8 S4 Sedan Wagon Models.
Confirm your chassis code, year range, and facelift / bumper style before ordering; send a photo of the install area if you want a fitment check.
Installation
Material & Finish
- Extreme Lightweight and Durable Carbon Fiber Construction
- Strong Carbon Fiber Construction
- Glossy Clear Coated
Key features
-
Diffuser upgrade — appearance-focused aero piece matched to the listed chassis
-
Extreme Lightweight and Durable Carbon Fiber Construction — lightweight motorsport material with a clear carbon weave look
-
Strong Carbon Fiber Construction — lightweight motorsport material with a clear carbon weave look
-
Glossy Clear Coated — finish / material called out on this listing
-
Chassis-specific fitment — confirm year, chassis code, and bumper style before ordering
Specifications
| Part |
Diffuser |
| Vehicle |
AUDI A4 B8 S4 Sedan Wagon |
| Material |
Extreme Lightweight and Durable Carbon Fiber Construction; Strong Carbon Fiber Construction; Glossy Clear Coated |
| Install |
Professional installation recommended |
Why upgrade
The rear valance is a large flat area on many cars. A diffuser gives the AUDI A4 B8 S4 Sedan Wagon a cleaner, more purposeful rear exit that photographs well.
FAQ
Will this fit my Audi?
It is made for the AUDI A4 B8 S4 Sedan Wagon. Other generations use different geometry and will not fit — always match chassis code, year, and facelift / bumper style.
Is it real carbon fiber?
This listing includes Extreme Lightweight and Durable Carbon Fiber Construction. Refer to Material & Finish above for every option on this product.
Do I need a body shop to install it?
Many owners have a body shop or detailing shop handle the install so panel gaps and fasteners are set correctly. Experienced DIY installers can also complete straightforward direct-fit pieces with care and the right tools.
Is it in stock?
This is made to order and takes 3-4 weeks to ship out after order confirmation.
Shop this AUDI A4 B8 S4 Carbon Fiber Rear Diffuser at CarGym with worldwide shipping and payment in all major currencies.
