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 to ensure durability in harsh conditions. Each performance exhaust system is made in the UK and distributed to over 90 countries worldwide. - Direct replacement for the original exhaust system - Available in multiple configurations for volume and tone - Manufactured from 304L aircraft grade stainless steel - Made in the UK and distributed globally Specifications: - Pipe Diameter: 76.20 - Fitment Time: 1.5 to 2 hours (including removing 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 Jet (oval) 104 x 80 Exhaust Tip, LH - MSTIP178 - Polished Jet (oval) 104 x 80 Exhaust Tip, RH - MSTIP179 Vehicle Compatibility: - Audi S1 2.0 TFSI quattro 2014-2018