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. Each performance exhaust system is made in the UK and distributed globally. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Manufactured from 304L aircraft grade stainless steel - Made 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: No Kit comes with: - MSAU693: LH Downpipe - MSAU694: RH Downpipe - MSAU696: LH Front Silencer Rep Pipe - MSAU697: RH Front Silencer Rep Pipe - MSAU701: LH Mounting Bracket - MSAU702: RH Mounting Bracket - MSAU711: Connecting Pipe - MSAU712: LH Rear Silencer with Valve - MSAU713: RH Rear Silencer with Valve - MSTIP226: Carbon Fibre Jet (round) 100 Exhaust Tip, Standard Vehicle Compatibility: - 2016 and later Audi S4 3.0 Turbo V6 B9 Saloon/Sedan & Avant (Sport Diff Models Only & Without Brace Bars) - Left Hand Drive Cars Only - 2017 and later Audi S5 3.0 V6 Turbo Sportback B9 (Sport Diff Models Only & without Brace Bars) - Left Hand Drive Cars Only