Audi TT TTRS 2.5TFSI Quattro (Non-OPF/GPF Models) YOC: 2016 - 2023 Part: Cat-back Info: 80mm Resonated Cat Back with Cerakote Black Trims - EC Approval Coming Soon (Awaiting Testing) tailpipe design: pipe diameter: 80mm /3,15inch EC-approved: No Race system: No Valvesonic: No Part no.: SSXAU960