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 a more aggressive tone if preferred. All products are manufactured from 304L 'Aircraft' Grade stainless steel, ensuring durability in harsh conditions. The systems are developed for a wide range of vehicles, with ongoing research and development to meet performance exhaust requirements. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Constructed from 304L 'Aircraft' Grade stainless steel - Manufactured in the UK and distributed worldwide Specifications: - Pipe Diameter: 63.50 - Fitment Time: 1 to 1.5 hours (including removing OE system) - Race Product: No - EMarked: Yes - EMark Number: AudiS4S5B9 Kit comes with: - LH Downpipe - MSAU693 - RH Downpipe - MSAU694 - LH Mounting Bracket - MSAU701 - RH Mounting Bracket - MSAU702 - Front Silencer - MSAU707 - Connecting Pipe - MSAU711 - LH Rear Silencer with Valve - MSAU712 - RH Rear Silencer with Valve - MSAU713 - Polished GT (round) 100 Exhaust Tip, Standard - MSVW373 Vehicle Compatibility: - 2017 and later Audi S5 3.0 V6 Turbo Coupe B9 (Sport Diff Models Only & Without Brace Bars, Left Hand Drive Only)