Audi RS6 C8 4.0 V8 bi-turbo (OPF/GPF Models) YOC: 2019 - Part: Particulate Filter-back Info: OPF/GPF Back System (Twin 80mm) with Cerakote Black Oval Trims - (Loudest) Does not requires cutting of the OE system tailpipe design: pipe diameter: 80mm /3,15inch EC-approved: No Race system: No Valvesonic: No Part no.: SSXAU904