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 and are produced in the UK. - Direct replacement for the original system - Available in multiple configurations for sound customization - Manufactured from 304L aircraft grade stainless steel - Designed for durability in harsh conditions 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: - LH Downpipe - MSAU693 - RH Downpipe - MSAU694 - Connecting Pipe - MSAU698 - LH Rear Silencer with Valve - MSAU699 - RH Rear Silencer with Valve - MSAU700 - LH Mounting Bracket - MSAU701 - RH Mounting Bracket - MSAU702 - Burnt Titanium GT (round) 90 Exhaust Tip, Standard - MSTIP217 - LH Front Silencer Rep Pipe - MSAU696 - RH Front Silencer Rep Pipe - MSAU697 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