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. 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. - Direct replacement for the original exhaust system - Multiple configurations for sound and tone customization - Constructed from 304L aircraft grade stainless steel - Made in the UK and distributed worldwide Specifications: - Pipe Diameter: 60.30 - Installation Time: 2 to 3 hours (including removal of 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 GT (round) 80 Exhaust Tip, LH - MSTIP211 - Cerakote Black GT (round) 80 Exhaust Tip, RH - MSTIP212 Vehicle Compatibility: - 2009-2012 Audi S4 3.0 Supercharged V6 B8 - 2010-2011 Audi S5 3.0 TFSI B8 Sportback