Audi S6 / S7 Avant / Limousine (C7) | Akrapovic | Evolution Line (Titanium)The Audi S range of cars features high performance V8 engines that are a perfect match for the Akrapovi Evolution exhaust systems. Styled and designed in house by Akrapovis engineers, the Audi S range of Evolution exhausts include valves that are steered through electric actuators designed to alter their position depending on the vehicles driving program and the drivers style. They can also be changed in the cars individual program settings. The