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 achieve a more aggressive tone. Each system is manufactured from 304L 'Aircraft' Grade stainless steel, ensuring durability in harsh conditions. The range is developed for a wide variety of vehicles, with ongoing research and development to meet current performance exhaust demands. All products are made in the UK and distributed to over 90 countries worldwide. - Direct replacement for the original exhaust system - Available in multiple configurations for custom sound and tone - Manufactured from 304L 'Aircraft' Grade stainless steel - Designed for a broad range of vehicles Specifications: - Pipe Diameter: 70.00 - Race Product: No - EMarked: No Kit comes with: - MSAU488: Y Pipe - MSAU488 - MSAU491: Polished GT (round) 100 Exhaust Tip - MSAU491 - MSAU523: Connecting Pipe - MSAU523 - MSAU524: LH Rear Silencer Assembly - MSAU524 - MSAU525: RH Rear Silencer Assembly - MSAU525 - MSAU557: Adapter Pipe - MSAU557 Vehicle Compatibility: - 2009-2011 Audi A4 2.0 TDi B8 140PS / 177PS 2WD Saloon and Avant (S line models only) - 2009-2011 Audi A4 2.0 TDi B8 177PS quattro Saloon and Avant - 2007-2012 Audi A5 Coupe 2.0 TDi