Audi RS6 C8 4.0 V8 bi-turbo (Non OPF/GPF Models - USA/ROW Models) YOC: 2020 - 2023 Part: Front Pipe-back Info: Front Silencer Back System (Twin 80mm) with Cerakote Black Oval Trims - EC Approved tailpipe design: pipe diameter: 80mm /3,15inch EC-approved: Yes Race system: No Valvesonic: No Part no.: SSXAU863