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 and a more aggressive tone if preferred. All products are manufactured from 304L aircraft grade stainless steel to ensure durability in harsh conditions. The performance exhaust systems are developed for a wide range of vehicles, with ongoing research and development to meet performance exhaust requirements. - 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 broad 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 - MSBM256: Rear Silencer - MSBM256 - MSBM257: Centre Silencer (Race) - MSBM257 - MSBM269: Rear Silencer Connecting Pipe Left Hand - MSBM269 - MSBM270: Rear Silencer Connecting Pipe Right Hand - MSBM270 - 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)