Fire extinguishers are mandatory in all cars that will see the track and should be mandatory in all street cars. There's no worse feeling then watching your car burn to the ground without the ability to do anything about it. This particular mount is specifically designed for the 918 style seats found in a few of the track focused models (see fitment below). It mounts directly to the bottom of the seat allowing the extinguisher to move with the seat, and is compatible with factory and most after-market sub belt brackets. Constructed from aircraft grade aluminum and meets all requirements for racing series or other organized track events. Designed to be used with most standard 2.5lb fire extinguishers, all hardware and installation instructions are included. Fire extinguisher and fire extinguisher quick disconnect not included.