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. 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 - Made in the UK and distributed globally Specifications: - Pipe Diameter: 60.30 - Installation 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 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 - 2010-2011 Audi S5 3.0 TFSI B8 Sportback