The Hartmann GT full exhaust system for the Audi B5 A4 1.8T FWD 5-speed is a complete stainless steel, mandrel bent, 64mm cat-back exhaust with twin double wall round tips. The Hartmann GT full exhaust system for the Audi B5 A4 1.8T FWD 5-speed has a deeper tone than stock and increases the loudness of the exhaust by about 20% to give a very nice sound and pleasant driving experience at all RPM's. Hartmann exhausts are fully made in the USA and have a lifetime warranty.