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 to over 90 countries worldwide. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Constructed from 304L aircraft grade stainless steel - Designed for a wide range of vehicles Specifications: - Pipe Diameter: 76.20 - Race Product: No - EMarked: No Kit comes with: - Polished GT (round) 90 Exhaust Tip, Standard - MSAU529 - Flexible Connecting Pipe - MSBM219 - Centre Connecting Pipe - MSBM220 - Rear Silencer Connecting Pipe - MSBM221 - Rear Silencer - Road - MSBM222 - Rear Silencer Connecting Pipe - MSBM224 Vehicle Compatibility: - 2012-2016 BMW 1 Series M135i 3 & 5 Door (F21 & F20, None xDrive)