The Cat-Back systems are designed as direct replacements for the original exhaust, offering improved sound and aesthetics. Multiple configurations are available, allowing owners to select the desired increase in exhaust volume or a more aggressive tone. Manufactured from 304L aircraft grade stainless steel, these systems are built to withstand harsh conditions. 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 sound customization - Constructed from 304L aircraft grade stainless steel - Manufactured in the UK and distributed globally Specifications: - Pipe Diameter: 60.30 - Race Product: No - EMarked: No Kit comes with: - LH Downpipe - MSAU461 - RH Downpipe - MSAU462 - Brace Bar - MSAU513 - X Pipe - MSAU594 - Centre Silencer - MSAU595 - RH ValveSonic Rear Silencer - MSAU597 - Cerakote Black Jet (oval) 150 x 92 Exhaust Tip, LH - MSAU598 - Cerakote Black Jet (oval) 150 x 92 Exhaust Tip, RH - MSAU599 - ValveSonic Electronic Valve Fitting Kit - MSVSFK01 - LH ValveSonic Rear Silencer - MSAU596 Vehicle Compatibility: - 2009-2012 Audi S4 3.0 Supercharged V6 B8 - 2009-2011 Audi S5 3.0 TFSI B8 Coupe & Cabriolet (S tronic)