Milltek Audi RS6 C8 4.0 V8 bi-turbo in Performance Edition (Non OPF/GPF Models - USA/ROW Models) (2020-2026) SSXAU904 Cat-back Cat Back System Non Resonated (Twin 80mm) with Cerakote Black Oval Trims - (Loudest) Does not requires cutting of the OE system 80mm 3,15"