A note about roll bars/cages on the street. Bars can be the cause significant injury to occupants of a street car. Many installation place bars close enough to the occupant's heads to impact them during a street accident. Typically to properly use the benefits of a cage a few other things are required: a helmet, lowered seats to give extra room between the bars and your head, a five (or more) point seat belt system to minimize the motion of the occupant's upper torso, proper roll bar padding (it is much stiffer than the pipe insulation that may people use). My wife has a caged car that we do street drive without helmets, not the smartest thing to do but we do it knowing what can go wrong and it does have lowered seats with racing harnesses.