Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Transform the rear end of your Audi with our KB Style Carbon Fiber Rear Diffuser with Integrated LED Brake Light for the 2018-2019 Audi A5 S Line and S5. Designed specifically for the B9 platform, this premium diffuser adds aggressive styling, enhanced visual presence, and a motorsport-inspired appearance that complements the factory body lines.
Featuring a functional-inspired KB Style design and an integrated LED brake light, this diffuser delivers the perfect balance of performance aesthetics and premium carbon fiber craftsmanship.
After months of sourcing and testing, we selected a supplier capable of delivering exceptional fitment, superior materials, and show-quality carbon fiber construction—allowing Audi enthusiasts to achieve a high-end appearance without spending $700-$800 on alternative options.
Aggressive KB Style Design
The KB Style diffuser dramatically enhances the rear profile of the Audi A5 and S5 by adding sharper lines, deeper contours, and a more performance-oriented appearance.
Its aggressive design complements factory bumpers while providing a more exotic and track-inspired look that stands out both on the road and at car shows.
Integrated LED Brake Light
A built-in LED brake light adds an extra motorsport-inspired touch while enhancing the diffuser's overall appearance. Inspired by modern performance and racing vehicles, the integrated light creates a distinctive rear-end signature that separates your Audi from the crowd.
Genuine Carbon Fiber Construction
Manufactured from real carbon fiber using a premium 2x2 weave pattern, this diffuser combines lightweight construction with exceptional strength and durability.
The high-gloss UV-protectant clear coat highlights the carbon fiber weave while helping protect against fading, yellowing, and environmental exposure.
OEM-Style Fitment
Engineered specifically for 2018-2019 Audi A5 S Line and S5 models, this diffuser provides precise fitment and integrates seamlessly with the factory rear bumper.
Designed for quad exhaust applications, it delivers an aggressive factory-plus appearance that looks right at home on any performance-oriented build.
Vehicle Fitment
Audi A5
- 2018 Audi A5 S Line
- 2019 Audi A5 S Line
Audi S5
- 2018 Audi S5
- 2019 Audi S5
Body Styles
- Coupe (2-Door)
- Sportback (4-Door)
Note: Does not fit Audi A5 Non S Line models.
Features
- Fits 2018-2019 Audi A5 S Line and S5
- Designed for the B9 platform
- Genuine carbon fiber construction
- Premium 2x2 carbon fiber weave
- Integrated LED brake light
- Gloss UV-protectant clear coat
- Aggressive KB Style design
- OEM-style fitment
- Quad exhaust configuration only
- Lightweight and durable construction
- Includes mounting hardware and 3M tape
Why Upgrade Your Rear Diffuser?
A carbon fiber rear diffuser is one of the most noticeable exterior upgrades for the Audi A5 and S5 platform. The KB Style design enhances the rear bumper with a more aggressive and performance-focused appearance while complementing other exterior modifications such as carbon fiber spoilers, mirror caps, side skirts, and front lips.
The integrated LED brake light further elevates the visual appeal by adding a unique motorsport-inspired feature that stands out day and night.
Installation
Professional installation is recommended to ensure proper fitment, alignment, and wiring of the integrated LED brake light.
Included in the Box
- KB Style Carbon Fiber Rear Diffuser
- Integrated LED Brake Light
- Mounting Hardware
- Automotive-Grade 3M Tape
Key Benefits
- Aggressive KB Style appearance
- Genuine carbon fiber construction
- Integrated LED brake light
- Premium 2x2 weave finish
- UV-resistant gloss coating
- OEM-inspired fitment
- Fits Coupe and Sportback models
- Designed for quad exhaust applications
- Perfect addition to any carbon fiber exterior package
Notes:
This is an aftermarket product and is not an OEM Audi component. Professional installation is recommended. Sold exclusively by German Car Accessories.
