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 made in the UK and distributed to over 90 countries. - Direct replacement for the original exhaust system - Available in multiple configurations for sound customization - Manufactured from 304L aircraft grade stainless steel - Made in the UK and distributed worldwide Specifications: - Pipe Diameter: 66.50 - Fitment Time: 1 to 1.5 hours (including removal of OE system) - Race Product: No - EMarked: No Kit comes with: - Cerakote Black GT (round) 90 Exhaust Tip, Standard - MSAU532 - Rear Silencer Assembly (Valved) - MSBM246 - Front Connecting Pipe - MSBM275 - Centre Connecting Pipe - MSBM276 - Outlet Pipe (Non-Valved) - MSBM277 - Outlet Pipe (Valved) - MSBM278 - LH Mounting Bracket - MSBM279 - RH Mounting Bracket - MSBM280 Vehicle Compatibility: - 2015-2018 BMW 1 Series M140i 3 & 5 Door (F20 & F21 LCI, Non-OPF)