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. All products are manufactured from 304L aircraft grade stainless steel, ensuring durability in harsh conditions. Performance exhaust systems are available for a wide range of vehicles. All products 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 - Manufactured from 304L aircraft grade stainless steel - Designed for a wide range of vehicles Specifications: - Pipe Diameter: 70.00 - Race Product: No - EMarked: No Kit comes with: - F5111: Adapter Pipe 70 O.D. to 65 I.D. 130 long - MSAU532: Cerakote Black GT (round) 90 Exhaust Tip, Standard - MSAU532 - MSBM256: Rear Silencer - MSBM256 - MSBM323: LH Centre Connection Pipe (Equal Length Version) - MSBM323 - MSBM324: RH Centre Connection Pipe (Equal Length Version) - MSBM324 Vehicle Compatibility: - 2014-2018 BMW 3 Series F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only) - 2014-2018 BMW 4 Series F82/83 M4 Coupe/Convertible & M4 Competition Coupe (Non-OPF equipped models only)