QW Carbon Diffuser

Elevate your B8.5 S4’s presence and performance with this precision-engineered rear diffuser, crafted to blend aggressive aesthetics with aerodynamic function. Designed specifically for the facelifted B8.5 platform (2013–2016), this diffuser integrates seamlessly into the OEM rear bumper, enhancing your Audi’s sport-inspired character without compromising fitment or durability.

Key Features:

• Perfect Fitment: Engineered for the B8.5 S4's rear bumper with OEM mounting points, ensuring a snug, hassle-free installation. No cutting or modifications required.

• Aggressive Styling: Gives the rear end a track-inspired look with sharp fins and a more dynamic profile—ideal for enthusiasts looking to add a subtle yet impactful performance touch.

• Functional Aero: Improves airflow under the vehicle to reduce drag and increase rear-end stability at speed. Not just for looks—this diffuser delivers measurable performance gains.

• Premium Materials: Constructed from high-grade lightweight carbon fiber with a UV-resistant coating to withstand harsh weather and daily driving.

• Exhaust Compatibility: Designed to accommodate the stock quad-tip exhaust as well as most aftermarket systems with dual-outlet setups.

Finish Options:

• Standard carbon fiber (2x2 weave)

Why Choose This Diffuser?

Whether you're going for a full exterior refresh or just want a clean, aggressive look from behind, this diffuser adds visual depth and performance styling to your B8.5 S4 while maintaining factory lines and proportions.