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 or a more aggressive tone. All products are manufactured from 304L aircraft grade stainless steel, ensuring durability in harsh conditions. The performance exhaust 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 customization - Manufactured from 304L aircraft grade stainless steel - Designed and made in the UK Specifications: - Pipe Diameter: 63.50 - Fitment Time: 1 to 1.5 hours (including removal of OE system) - Race Product: No - EMarked: No Kit comes with: - MSAU693: LH Downpipe - MSAU693 - MSAU694: RH Downpipe - MSAU694 - MSAU696: LH Front Silencer Rep Pipe - MSAU696 - MSAU697: RH Front Silencer Rep Pipe - MSAU697 - MSAU698: Connecting Pipe - MSAU698 - MSAU699: LH Rear Silencer with Valve - MSAU699 - MSAU700: RH Rear Silencer with Valve - MSAU700 - MSAU701: LH Mounting Bracket - MSAU701 - MSAU702: RH Mounting Bracket - MSAU702 - MSVW372: Cerakote Black GT (round) 100 Exhaust Tip, Standard - MSVW372 Vehicle Compatibility: - 2016 and later Audi S4 3.0 Turbo V6 B9 Saloon/Sedan & Avant (Non Sport Diff Models) Left Hand Drive - 2017 and later Audi S5 3.0 V6 Turbo Sportback B9 (Non Sport Diff Models Only) Left Hand Drive