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. Each performance exhaust system is made in the UK and distributed to over 90 countries worldwide. - Direct replacement for the original system - Available in multiple configurations for sound and tone - Manufactured from 304L aircraft grade stainless steel - Made in the UK and distributed globally Specifications: - Pipe Diameter: 57.15 - Installation Time: 2 to 3 hours (including removing OE system) - Race Product: No - EMarked: No Kit comes with: - Front Link Pipe Assembly - MSAU176 - RH Centre Section - MSAU177 - LH Centre Section - MSAU178 - LH Rear Silencer - MSAU270 - RH Rear Silencer - MSAU271 - Brace Bar - MSAU314 - GT-100 Cerakote Black Trims - MSTIP274 Vehicle Compatibility: - Audi S4 4.2 V8 quattro B6 Saloon/Sedan, Avant, Cabriolet 2003-2005