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 performance exhaust systems are made in the UK and distributed globally. - 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 worldwide Specifications: - Pipe Diameter: 76.20 - Fitting Time: 1.5 to 2 hours (including removal of OE system) - Race Product: No - EMarked: Yes - EMark Number: e24*70/157*2007/34*2206*00 Kit comes with: - Adapter Pipe for Catback - MSAU642 - Centre Silencer - MSAU643 - Rear Silencer - MSAU644 - LH Rear Connecting Pipe (inc. Electric Valve) - MSAU645 - RH Rear Connecting Pipe - MSAU646 - Polished GT (round) 90 Exhaust Tip, LH - MSTIP180 - Polished GT (round) 90 Exhaust Tip, RH - MSTIP181 Vehicle Compatibility: - 2014-2018 Audi S1 2.0 TFSI quattro