



Audi S4 / A4 S Line Carbon Fiber Rear Diffuser
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Enhance the sporty appearance and aerodynamic performance of your Audi S4 or A4 S Line with our carbon fiber rear diffuser. Designed to complement the vehicle's styling while improving overall dynamics, this upgrade is a must-have for enthusiasts seeking both form and function.
Key Features:
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Custom Fit:
- Tailored specifically for Audi S4 and A4 S Line models, ensuring seamless integration with the rear bumper.
- Precision engineering for a factory-like fitment and enhanced visual appeal.
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Carbon Fiber Construction:
- Crafted from high-quality carbon fiber material, providing lightweight performance and exceptional durability.
- Enhances the sporty aesthetic of your Audi while offering enhanced aerodynamic benefits.
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Aerodynamic Enhancement:
- Reduces lift and improves downforce, enhancing stability and cornering performance.
- Engineered for optimized airflow management, minimizing drag and enhancing overall driving dynamics.
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Aggressive Styling:
- Features a dynamic and aggressive design that complements the vehicle's lines and adds a touch of exclusivity to the rear end.
- Elevates the visual presence of your Audi S4 or A4 S Line for a more assertive stance on the road.
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Easy Installation:
- Designed for straightforward installation with no modifications required.
- Bolt-on design ensures a secure and hassle-free fitting process, allowing for quick and convenient installation.
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UV-Resistant Coating:
- Clear coat finish provides protection against UV rays, ensuring long-lasting durability and maintaining the carbon fiber's glossy appearance.
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Compatibility:
- Specifically designed for Audi S4 and A4 S Line models, guaranteeing compatibility and seamless integration with the vehicle's rear bumper.
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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