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 systems are developed for a wide range of vehicles, with ongoing research and development to meet performance exhaust requirements. All products are made in the UK and distributed to over 90 countries. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Manufactured from 304L aircraft grade stainless steel - Developed for a wide range of vehicles Specifications: - Pipe Diameter: 60.30 - Installation Time: 2 to 3 hours (including removing OE system) - Race Product: No - EMarked: No Kit comes with: - LH Downpipe - MSAU461 - RH Downpipe - MSAU462 - Front Silencer - MSAU463 - Centre Silencer - MSAU464 - LH Rear Silencer Delete Pipe - MSAU467 - RH Rear Silencer Bypass Pipe - MSAU468 - Brace Bar - MSAU513 - Cerakote Black Jet (oval) 150 x 95 Exhaust Tip, LH - MSTIP144 - Cerakote Black Jet (oval) 150 x 95 Exhaust Tip, RH - MSTIP145 Vehicle Compatibility: - 2009-2012 Audi S4 3.0 Supercharged V6 B8