ECSTuningCarbonFibreRearDiffuser-A4/S4B9

Upgrade your exterior styling with the ECS Tuning Carbon Fiber Rear Diffuser. This diffuser was engineered and designed in-house to add a more aggressive appearance to the rear of your vehicle that matches with the factory appeal of the Audi B9 S4. An exclusive design only available through ECS Tuning, this rear diffuser will be sure to catch attention and turn heads. The diffuser is crafted of high quality hand laid carbon fiber to achieve it's world class appearance and durability and provides an aggressive and sporty style that's sure to set your vehicle apart from the rest. Features a dual tip/dual outlet design to fit the factory and most aftermarket exhaust systems and is designed to accept exhaust tips up to 4