Downpipe designed for: Audi S6 C7 4G Audi S7 C7 Audi RS6 C7 4G Audi RS7 C7 Hole diameter - 57mmx2 Pipe diameter - 70mm TurboWorks downpipe is made of 100% stainless steel. Outlet diameter: 63mm Downpipe designed for: Audi S6 C7 2012 + TurboWorks downpipe, made of 100% stainless steel. Outlet diameter: 63mm