The Cat-Back systems are designed as direct replacements for the original exhaust, offering improvements in sound and aesthetics. Multiple configurations are available, allowing the owner to select the desired increase in exhaust volume or a more aggressive tone. Manufactured from 304L aircraft grade stainless steel, these systems are built to withstand harsh conditions. All products are made in the UK and distributed globally, supporting a wide range of vehicles. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Constructed from 304L aircraft grade stainless steel - Made in the UK and distributed to over 90 countries Specifications: - Pipe Diameter: 80.00 - Installation Time: 4 to 4.5 hours (including removal of OE system) - Race Product: No - EMarked: No Kit comes with: - MSAU744: LH Front Silencer - MSAU744 - MSAU745: RH Front Silencer - MSAU745 - MSAU746: Active Valved Centre Section - MSAU746 - MSAU747: LH Connecting Pipe - MSAU747 - MSAU748: RH Connecting Pipe (To Milltek OPF Back System) - MSAU748 - MSAU749: LH Rear Section - MSAU749 - MSAU750: RH Rear Section - MSAU750 - MSAU751: LH Valved Outlet (Inc Actuator) - MSAU751 - MSAU770: LH Connecting Pipe to OE Downpipe Flange - MSAU771: RH Connecting Pipe to OE Downpipe Flange - MSTIP269: LH Polished Oval Trim - MSTIP269 - MSTIP270: RH Polished Oval Trim - MSTIP270 Vehicle Compatibility: - 2020 and later Audi RS6 C8 4.0 V8 bi-turbo Performance Edition (Non OPF/GPF Models - USA/ROW Models) - 2019 and later Audi RS7 C8 4.0 V8 bi-turbo (Non OPF/GPF US/ROW Models)