Downpipe by TurboWorks, made of stainless steel.Downpipe designed for: Audi S4 C5 4.2 V8 1995-2001 Audi RS6 C5 4.2 V8 2002-2004 Dimensions: Outer diameter - 63mm Flange for serial turbine TurboWorks downpipe, made of stainless steel.Downpipe designed for: Audi S4 C5 4.2 V8 1995-2001 Audi RS6 C5 4.2 V8 2002-2004 Dimensions: Outer diameter - 63mm Flange for original turbo & nbsp