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 globally. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Manufactured from 304L aircraft grade stainless steel - Made in the UK and distributed worldwide 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 - MSBM256: Rear Silencer - MSBM256 - MSBM323: LH Centre Connection Pipe (Equal Length Version) - MSBM323 - MSBM324: RH Centre Connection Pipe (Equal Length Version) - MSBM324 - MSTIP225: Carbon Fibre Jet (round) 90 Exhaust Tip, Standard - MSTIP225 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)