Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Enhance the rear-end styling of your Audi S4 with this KB Style Carbon Fiber Rear Diffuser, designed specifically for 2020-2025 B9.5 models. This aggressive rear upgrade delivers a motorsport-inspired appearance while integrating a functional LED brake light for added visibility and modern styling.
Crafted from premium 2x2 weave carbon fiber and finished in a high-gloss UV-protected clear coat, this diffuser provides a lightweight yet durable construction that enhances both aesthetics and performance-focused design. The integrated LED brake light adds a distinctive visual signature, giving your S4 a more premium and track-inspired presence.
Engineered for OEM-style fitment, this diffuser follows the factory rear bumper lines for a precise and seamless installation. Designed as a direct upgrade, it enhances the lower rear profile while maintaining factory alignment and structural integrity.
After extensive sourcing and testing, German Car Accessories has selected a carbon fiber rear diffuser that delivers excellent fitment, premium materials, and strong visual impact at a fraction of OEM pricing.
Features
- KB Style aggressive rear diffuser design
- Integrated LED brake light for enhanced visibility
- Genuine 2x2 carbon fiber construction
- High-gloss UV-protected clear coat finish
- Lightweight and durable build quality
- OEM-style fitment for clean installation
- Enhances rear-end styling and road presence
- Motorsports-inspired aerodynamic appearance
Vehicle Fitment
Fits the following models:
- 2020 Audi S4 B9.5
- 2021 Audi S4 B9.5
- 2022 Audi S4 B9.5
- 2023 Audi S4 B9.5
- 2024 Audi S4 B9.5
- 2025 Audi S4 B9.5
Does Not Fit
- Audi A4 Non S-Line Models
- Audi A4 S-Line Models
Specifications
- Material: Real Carbon Fiber
- Carbon Fiber Weave: 2x2 Twill Weave
- Finish: Gloss UV-Protectant Clear Coat
- Style: KB Style Rear Diffuser with LED Brake Light
- Chassis: B9.5
- Installation: Bolts and 3M Automotive Tape Included
- Installation Type: Professional Installation Recommended
Important Notes
- Professional installation is required for proper fitment and wiring of LED brake light.
- Wiring may be required for brake light functionality.
- This is an aftermarket product and is not manufactured, endorsed, or supplied by Audi.
- Carbon fiber weave variation may occur due to manufacturing processes.
Why Upgrade?
- Aggressive motorsport-inspired rear styling
- Integrated LED brake light for modern appearance
- Premium real carbon fiber construction
- Improves visual width and rear presence
- Lightweight and durable design
- OEM-style fitment for seamless integration
- Cost-effective alternative to OEM styling components
