

Audi B8.5 S4 & A4 KB Style Carbon Fiber Rear Diffuser
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The KB Style Carbon Fiber Rear Diffuser for the Audi B8.5 S4 & A4 S Line (2013-2016) is a premium aftermarket accessory designed to upgrade the rear aesthetics and aerodynamic performance of your vehicle. This diffuser is tailored for the B8.5 facelift models, bringing a sporty and aggressive look along with functional enhancements.
Key Features:
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KB Style Design:
- Aggressive Sporty Appearance: Adds a bold, race-inspired look to the rear of your Audi, enhancing its aggressive stance.
- S4 & A4 S Line Specific: Designed to perfectly complement the 2013-2016 B8.5 S4 and A4 S Line trims, integrating seamlessly with the factory styling.
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High-Quality Carbon Fiber Construction:
- Lightweight and Durable: Made from high-grade carbon fiber, known for its exceptional strength-to-weight ratio, ensuring longevity and performance without adding unnecessary weight.
- Distinctive Weave Pattern: Features the signature carbon fiber weave, providing a luxurious and high-tech visual appeal.
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Aerodynamic Enhancements:
- Improved Downforce: Enhances the vehicle’s rear stability and handling by increasing downforce and managing airflow more efficiently.
- Optimized Airflow Management: Helps reduce drag and improve overall aerodynamic efficiency, contributing to better performance and potentially improved fuel efficiency.
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Glossy Finish:
- Premium Shine: The glossy clear-coated finish accentuates the carbon fiber’s texture, adding a sophisticated and polished look to your vehicle.
- UV and Scratch Resistant: Offers protection against UV damage and minor abrasions, maintaining its premium appearance over time.
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Perfect Fit for B8.5 S4 & A4 S Line (2013-2016):
- Precision Engineered: Specifically designed to fit the rear bumper of the B8.5 facelift S4 and A4 S Line models, ensuring a precise and secure fit.
- OEM-Like Integration: Blends seamlessly with the existing bumper design, giving a factory-installed appearance and enhancing the car’s overall look.
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Shipping Information:
If a product is in stock, it’s usually delivered within 2–10 days, depending on your location.
If a product is made to order, production takes approximately 2–4 weeks, followed by 1–3 weeks for delivery, depending on your location.
We can always arrange faster air shipping upon request — please contact us for an individual quote.
Installation Recommendations:
It is recommended that all installation and upgrades are carried out by a qualified professional workshop to ensure proper fit.
If the product is installed incorrectly, we cannot accept responsibility for any resulting damage or issues.
If you have any questions, feel free to reach out to Customer Shopping Assistant.
When referring to a product, please include the product link for faster assistance.

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