Audi S6 4.0 TFSI C7 quattro YOC: 2012 - 2018 Part: Cat-back Info: Non-resonated (louder) with Cerakote Black Tips - Recommended with Valve Delete Modules SSXAU405 to prevent ECU fault codes tailpipe design: Quad 100mm GT100 pipe diameter: 70mm /2,76inch EC-approved: No Race system: No Valvesonic: No Part no.: SSXAU737