Description
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Give your Audi A4 or S4 a more aggressive and performance-inspired appearance with this premium Carbon Fiber KB Style Rear Diffuser. Designed specifically for 2017-2020 B9 Audi A4 and S4 models, this diffuser features sharp aerodynamic fins and an integrated LED brake light that creates a race-inspired rear-end transformation.
Constructed from genuine carbon fiber and finished with a UV-protected gloss clear coat, this diffuser delivers exceptional style, durability, and premium fitment.
Aggressive KB Style Design
The KB Style Diffuser dramatically enhances the appearance of your Audi's rear bumper with bold aerodynamic fins and an aggressive profile. Inspired by high-performance Audi models, this diffuser provides a more athletic and commanding stance while maintaining clean body lines.
The distinctive design instantly separates your vehicle from the crowd and creates a more premium motorsport-inspired look.
Integrated LED Brake Light
A center-mounted LED brake light is seamlessly integrated into the diffuser design, adding a modern performance aesthetic while improving visibility.
This race-inspired feature gives the rear end a unique appearance that resembles the styling found on modern performance and motorsport vehicles.
Premium Real Carbon Fiber Construction
Manufactured from genuine carbon fiber, this diffuser offers lightweight strength and long-lasting durability. The premium 2x2 carbon fiber weave provides a high-end appearance that complements other carbon fiber exterior upgrades.
A glossy UV-resistant clear coat helps protect the finish from fading, discoloration, and environmental exposure.
Designed for B9 Audi A4 & S4 Models
Engineered specifically for 2017-2020 Audi A4 and S4 vehicles, this diffuser is designed to follow the contours of the factory rear bumper for a clean and aggressive appearance.
Its precision fitment ensures a seamless integration with the vehicle's rear-end styling.
Quad Exhaust Configuration
All diffusers are manufactured exclusively with quad exhaust cutouts, making them ideal for Audi enthusiasts seeking a true performance-inspired rear-end appearance.
The quad outlet design creates a sportier and more aggressive visual presence.
Vehicle Fitment
Audi A4 & S4 (B9)
- 2017 Audi A4 Non S-Line
- 2017 Audi A4 S-Line
- 2017 Audi S4
- 2018 Audi A4 Non S-Line
- 2018 Audi A4 S-Line
- 2018 Audi S4
- 2019 Audi A4 Non S-Line
- 2019 Audi A4 S-Line
- 2019 Audi S4
- 2020 Audi A4 Non S-Line
- 2020 Audi A4 S-Line
- 2020 Audi S4
Features
- KB Style rear diffuser design
- Integrated LED brake light
- Genuine carbon fiber construction
- Premium 2x2 carbon fiber weave
- Glossy UV-protective clear coat
- Aggressive aerodynamic fin design
- Quad exhaust outlet configuration
- Lightweight and durable construction
- Precision fitment for B9 Audi models
- Motorsport-inspired appearance
Benefits
- Transforms rear-end styling
- Enhances vehicle presence and aggressiveness
- Premium carbon fiber appearance
- Complements other exterior modifications
- Improves overall vehicle aesthetics
- Lightweight yet durable construction
- Exclusive quad exhaust styling
- Adds race-inspired LED lighting detail
Why Choose a Carbon Fiber Rear Diffuser?
A rear diffuser is one of the most impactful exterior upgrades available for the Audi B9 platform. This Carbon Fiber KB Style Diffuser adds depth, aggression, and premium styling while giving your Audi a more performance-oriented appearance.
Combined with the integrated LED brake light and genuine carbon fiber construction, this diffuser delivers a complete rear-end transformation.
Package Includes
- (1) Carbon Fiber KB Style Rear Diffuser
- Integrated LED Brake Light
- Mounting Hardware
- 3M Installation Tape
Specifications
- Material: Real Carbon Fiber
- Carbon Fiber Pattern: 2x2 Weave
- Finish: Gloss UV-Protected Clear Coat
- Style: KB Style Diffuser
- Lighting: Integrated LED Brake Light
- Exhaust Configuration: Quad Exhaust Cutouts Only
- Installation: Professional Installation Recommended
Installation Notes
Professional installation is recommended. Hardware and 3M tape are included to assist with installation. Proper alignment and secure mounting are necessary to achieve the best fit and appearance.
Notes:
This is an aftermarket product and is not manufactured, endorsed, or supplied by Audi. Professional installation is strongly recommended. Please verify vehicle compatibility before purchasing.
