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. Each system is manufactured from 304L aircraft grade stainless steel, ensuring durability in harsh conditions. All products are made in the UK and distributed to over 90 countries. - Direct replacement for the original exhaust system - Available in multiple configurations for sound customization - Constructed from 304L aircraft grade stainless steel - Made in the UK and distributed worldwide Specifications: - Pipe Diameter: 70.00 - Installation Time: 1 to 1.5 hours (including removal of OE system) - Race Product: No - EMarked: No Kit comes with: - MSAU529: Polished GT (round) 90 Exhaust Tip, Standard - MSAU529 - MSBM224: Rear Silencer Connecting Pipe - MSBM224 - MSBM318: Rear Silencer Bypass - MSBM318 Vehicle Compatibility: - 2016-2019 BMW 1 Series 120i & 125i (F20 & F21 - B48 Engine Only including OPF Models)