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 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 - Manufactured in the UK and distributed worldwide Specifications: - Pipe Diameter: 69.85 - Race Product: No - EMarked: No Kit comes with: - Connecting Pipe - MSBM181 - Centre Silencer - MSBM182 - Trim Assembly - MSBM183 Vehicle Compatibility: - 2007-2012 BMW 1 Series 118d & 120d M Sport 3-door (E81) - 2004-2011 BMW 1 Series 118d & 120d M Sport 5-door Hatchback (E87) - 2007-2012 BMW 1 Series 123d M Sport 3-door (E81) - 2004-2011 BMW 1 Series 123d M Sport 5-door Hatchback (E87)