Advanced 3D scanning tools and cutting-edge software provide our engineers with a high-resolution digital model of the Audi B9 S4 chassis. This data is then used to maximize the exhaust size for flow and optimize all available space for the perfect catback fitment. CORSA branded exhaust systems are backed by a Limited Lifetime warranty for as long as you own your vehicle with proof of purchase. The new exhaust sounds perfect, a marked improvement over stock. It is not too loud - I use the car as a daily driver and drive in capital beltway traffic.

SPD’s 304 stainless high performance resonator cat-back pipe replaces your factory resonator pipe wi.. SPD’s high performance stage 2 resonator cat-back pipe replaces your factory resonator pipe with a t.. We have redesigned our GX Series catback systems and will have them available to ship at the end of .. The exhaust system is one of the most important parts of any vehicle. It protects the driver and other nearby cars almost as much as the braking system does. If you want your car to take care of you, you need to take the best care of it.

Because the success of a catback exhaust system&nbsp