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. Each system is manufactured from 304L aircraft grade stainless steel, ensuring durability in harsh conditions. All products are made in the UK and distributed to over 90 countries. - Direct replacement for the original system - Available in multiple configurations for sound and tone adjustment - Manufactured from 304L aircraft grade stainless steel - Made in the UK and distributed worldwide Specifications: - Pipe Diameter: 60.30 - Fitting Time: 2 to 3 hours (including removing OE system) - Race Product: No - EMarked: Yes - EMark Number: e24 70_157 2007_34 1523 00 Kit comes with: - LH Downpipe - MSAU461 - RH Downpipe - MSAU462 - Front Silencer - MSAU463 - Centre Silencer - MSAU464 - LH Rear Section (no tip) - MSAU503 - RH Rear Section (no tip) - MSAU504 - 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