The Cat-Back systems are designed as direct replacements for the original exhaust, offering improved sound and aesthetics. Multiple configurations are available, allowing the owner to select the desired increase in exhaust volume and achieve a more aggressive tone if preferred. Manufactured from 304L aircraft grade stainless steel, these systems are built to withstand harsh conditions. All products are made in the UK and distributed to over 90 countries worldwide. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone adjustment - Constructed from 304L aircraft grade stainless steel - Made in the UK and distributed globally Specifications: - Pipe Diameter: 70.00 - Installation Time: 2 to 2.5 hours (including removal of OE system) - Race Product: No - EMarked: No Kit comes with: - MSAU723: LH Lower Downpipe - MSAU723 - MSAU724: RH Lower Downpipe - MSAU724 - MSAU726REP: Front Silencer Delete Pipe - MSAU726REP - MSAU727REP: Centre Silencer Delete Pipe - MSAU727REP - MSAU728: LH Rear Silencer (Race) Valved - MSAU728 - MSAU729: RH Rear Silencer (Race) Valved - MSAU729 - MSTIP257: Burnt Titanium Jet (Oval) 170 x 107 Exhaust Tip - MSTIP257 - MSTIP258: Burnt Titanium Jet (Oval) 170 x 107 Exhaust Tip - MSTIP258 - MSVS032: Valve Extension Cable - MSVS032 Vehicle Compatibility: - 2018 and later Audi RS4 B9 2.9 V6 Turbo Avant (Non OPF/GPF Models) - 2018-2019 Audi RS5 B9 2.9 V6 Turbo Sportback (Non-OPF/GPF Models)