Description
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Upgrade the rear-end styling of your Audi A4 or S4 with this KB Style Carbon Fiber Rear Diffuser, designed specifically for 2017-2020 B9 chassis models. This aggressive rear enhancement features an integrated LED brake light, delivering a modern motorsport-inspired appearance while maintaining OEM-style fitment and integration.
Constructed from premium real 2x2 weave carbon fiber, this diffuser offers a lightweight yet durable structure with a high-gloss UV-protected clear coat finish. The result is a deep, reflective surface that enhances the rear aesthetics while resisting fading and environmental wear over time.
Engineered exclusively for quad exhaust configurations, this diffuser ensures proper fitment and a performance-oriented rear profile. The integrated LED brake light adds an additional layer of visibility and visual impact, reinforcing the sporty character of the vehicle.
After extensive sourcing and quality refinement, German Car Accessories delivers a carbon fiber diffuser that balances aggressive styling, precision fitment, and long-term durability at a competitive price point.
Features
- KB Style aggressive rear diffuser design
- Integrated LED brake light for enhanced visibility
- Real 2x2 carbon fiber construction
- High-gloss UV-protected clear coat finish
- Lightweight and durable performance build
- OEM-style fitment for clean installation
- Designed exclusively for quad exhaust setups
- Enhances rear-end stance and visual width
Vehicle Fitment
Fits the following models:
- 2017 Audi A4 Non S-Line (B9)
- 2017 Audi A4 S-Line (B9)
- 2017 Audi S4 (B9)
- 2018 Audi A4 Non S-Line (B9)
- 2018 Audi A4 S-Line (B9)
- 2018 Audi S4 (B9)
- 2019 Audi A4 Non S-Line (B9)
- 2019 Audi A4 S-Line (B9)
- 2019 Audi S4 (B9)
- 2020 Audi A4 Non S-Line (B9)
- 2020 Audi A4 S-Line (B9)
- 2020 Audi S4 (B9)
Specifications
- Material: Real Carbon Fiber
- Weave: 2x2 Twill Carbon Fiber
- Finish: Gloss UV-Protectant Clear Coat
- Style: KB Style Rear Diffuser with LED Brake Light
- Exhaust Cutout: Quad Exhaust Only
- Chassis: B9
- Installation: Bolts and 3M Automotive Tape Included
- Installation Type: Professional Installation Recommended
Important Notes
- Designed exclusively for quad exhaust configurations.
- Professional installation required, especially for LED brake light wiring.
- This is an aftermarket product and is not affiliated with Audi.
- Carbon fiber pattern may vary slightly due to manufacturing process.
Why Upgrade?
- Aggressive OEM+ rear-end styling
- Integrated LED brake light for modern appearance
- Real carbon fiber lightweight construction
- Enhanced rear stance and visual width
- Durable gloss UV-protected finish
- Direct-fit performance styling upgrade
- Ideal for sport and performance builds
