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.
As a result, our popularity has increased, and we work tirelessly to maintain our quality systems while fulfilling orders. Please be aware that while we typically exceed our estimated wait times, we have been successfully operating for three years and no customer has ever been left without their system, or a cancellation/refund. At Rae, we are expanding our team and investing in additional resources and machines to ensure we stay at the forefront of innovation. With our ambitious plans, we are on track to meet demand and increase our inventory of premium parts by the end of the year. Please note that purchasing this product is agreeing to understand this concept. Amplify your vehicle's performance and sound with Full-Race's premium Exhaust systems - reliable power and efficiency harmonize with a brand that’s trusted for quality and performance.
By running pipes from the catalytic converter to the muffler and from the muffler to the exhaust tip, cat back exhaust systems improve exhaust gas flow, providing small performance boosts. However, your performance gains may be limited if your catalytic converter restricts gas flow, as a catback exhaust system is installed ‘downstream’ of the converter. Header-back systems are increasingly rare, namely because of modern emissions systems. Since removing your vehicle’s factory emissions components is highly illegal, the previous two options are more common. However, header-back systems are still available for some older, pre-emissions applications. In these cases, header-back systems offer more performance and volume than cat-back or axle-back systems