Cruisers are split into one class for four cylinders and another for larger motors. Cruisers also must have a roll hoop to keep the roof from collapsing in case of a rollover. Cruisers at KMS are also split into classes. Lain said the division doesn't require cruisier drivers to reinforce the doors unless they have been damaged in a wreck. Then, the driver either finds a replacement at a salvage yard or puts in a steel bar.
Tracks have inspectors who check cars to make sure they are legal.
But the safety rules are an outline only. Drivers are free to add whatever safety features they want. Here, you've got a Volkswagon, a Renault, or a 'K' car, or Fords, or Chevrolets or Chryslers. All they can do is make them as safe as they can. The best safety feature of all is a driver's brain.