Milltek Milltek Particulate Filter-back OPF/GPF Back System (Twin 80mm) with Polished Oval Trims - (Loudest) Does not requires cutting of the OE system - RS6 - C8 4.0 V8 bi-turbo (OPF/GPF Models) - 2019 - 2021 - SSXAU904
Milltek Milltek Particulate Filter-back OPF/GPF Back System (Twin 80mm) with Cerakote Black Oval Trims - (Loudest) Does not requires cutting of the OE system - RS6 - C8 4.0 V8 bi-turbo (OPF/GPF Models) - 2019 - 2021 - SSXAU904
Milltek Milltek Particulate Filter-back - OPF/GPF Back System (Twin 80mm) with Polished Oval Trims (Loudest) - Requires OE system to be Cut - RS6 - C8 4.0 V8 bi-turbo (OPF/GPF Models) - 2019 - 2021 - SSXAU864
Milltek Milltek Particulate Filter-back - OPF/GPF Back System (Twin 80mm) with Cerakote Black Oval Trims - (Louder) Requires OE system to be Cut - RS6 - C8 4.0 V8 bi-turbo (OPF/GPF Models) - 2019 - 2021 - SSXAU865
Milltek Milltek Large Bore Downpipes and Hi-Flow Sports Cats - Fits to OE OPF/GPF Back System include OPF/GPF Bypass - Requires Stage 2 ECU Software - RS6 - C8 4.0 V8 bi-turbo (OPF/GPF Models) - 2019 - 2021 - SSXAU869
Milltek Milltek Large Bore Downpipes and Hi-Flow Sports Cats - Fits to Milltek Sport OPF/GPF Back System include OPF/GPF Bypass - Requires Stage 2 ECU Software - RS6 - C8 4.0 V8 bi-turbo (OPF/GPF Models) - 2019 - 2021 - SSXAU868
