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. Each performance exhaust system is 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 worldwide. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Manufactured from 304L aircraft grade stainless steel - Designed for a wide range of vehicles Specifications: - Pipe Diameter: 69.85 - Race Product: No - EMarked: Yes - EMark Number: e24*70/157*2007/34*2098*01 Kit comes with: - Centre Silencer - MSAU570 - LH Front Pipe Assembly - MSAU587REP - RH Front Pipe Assembly - MSAU588REP - ValveSonic LH Rear Silencer - MSAU589 - ValveSonic RH Rear Silencer - MSAU590 Vehicle Compatibility: - 2013-2018 Audi RS6 C7 4.0 TFSI biturbo quattro including Performance Edition - 2013-2018 Audi RS7 C7 Sportback 4.0 V8 TFSI biturbo including Performance Edition