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.
Unlike your stock system, CORSA exhaust systems don't utilize performance-robbing restrictions that reduce airflow, such as chambered designs, baffles or spring-loaded valves. With wider tubing and our mandrel-bent design, your new full exhaust system will allow for reduced backpressure and provide cleaner oxygenized air to your engine. You'll see benefits like increased horsepower, torque boost and better fuel economy.
Because the success of a catback exhaust system