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Audi S4 B9 Carbon Fiber Rear Diffuser

Audi S4 B9 Carbon Fiber Rear Diffuser
Part Number: audis404
Brand: RWCarbon
List Price: $599.95
Price: $499.95


Customer Testimonials
Quality Guarantee
Carbon Fiber Maintenance

Built from the traditional 2x2 carbon fiber weave, this S4 Sedan Carbon Fiber Rear Diffuser is a superior addition for your Audi to improve the look of your vehicle. Our carbon fiber diffusers offers superior styling and proper fitment compared to the other options on the market. This rear diffuser is backed by a fitment and quality guarantee, RW Carbon has you covered. Each carbon fiber diffuser goes through a rigorous quality control process before leaving our Southern California warehouse to be shipped to you. 

Contact us with any questions you have about the Audi S4 Sedan Carbon Fiber Rear Diffuser.(714) 328-4406


  • 2017+ Audi S4 Sedan B9 Facelift
  • NOT for Audi A4 B9 Base/Sline Models


  • Quality Controlled
  • Quality and Fitment Guarantee
  • UV Resistant Clear Coat
  • Same Traditional Carbon Fiber Weave
  • Aggressive Styling

Professional installation is always recommended for RW Carbon's products including this Audi S4 Sedan Carbon Fiber Rear Diffuser. For installation on the diffuser, you MUST remove the bumper.

Why Choose RW Carbon?
We know there are many companies out there claiming to have the best carbon fiber rear diffusers for your Audi. At RW Carbon we pride ourselves on taking the time to quality check every piece we ship out. Many other competitors ship you a product that comes straight from overseas - without taking the time to check it. If you order one of these parts you could receive a part that is damaged, has scratches in the clear coat, or possesses overall poor carbon fiber construction. By choosing RW Carbon we make the promise to deliver you a consistent, quality product that is shipped from our Southern California location - the first and every subsequent time you order from us. One Goal, One Focus - Carbon Fiber.


Audi S4 B9 Carbon Fiber Rear Diffuser

Audi S4 B9 Carbon Fiber Rear Diffuser

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Part # Description Price
audis404 Audi S4 B9 Carbon Fiber Rear Diffuser $499.95 Add to Cart

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Fits These Applications:

Year Make Model SubModel Engine Transmission Drive
2019 - 2021 Audi S4 B9 Facelift RWC

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