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 exhaust volume and tone. Each system is constructed from 304L aircraft grade stainless steel to ensure durability in harsh conditions. These performance exhaust systems are engineered for a wide range of vehicles, with ongoing research and development to meet evolving performance needs. All products are manufactured 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 - Manufactured in the UK and distributed globally Specifications: - Pipe Diameter: 70.00 - Fitment Time: 1 to 1.5 hours (including removal of OE system) - Race Product: No - EMarked: No Kit comes with: - MSBM315: GT-80 Inner Tailpipe - Polished - MSBM315 - MSBM316: Rear Silencer Bypass - MSBM316 - MSBM317: Outer Tailpipe Link Pipe - MSBM317 - MSTIP266: GT-80 Polished Trim - MSTIP266 Vehicle Compatibility: - 2016-2019 BMW 1 Series 120i & 125i (F20 & F21 - B48 Engine Only inc OPF Models)