the class was born at Atco raceway. A very big bracket racing track. A lot of the rules were put into place to keep super pro type cars out of the class. Why? well it was conceived as a class to race "street type" cars in a fast and somewhat economical format. Cars that at that time were not really competitive in Atcos Q8 program (which now is 10.5 racing )Thats why you see so many types of cars in the class, they are not competitive or the owners dont want to dump tons of money to be cometitive in thier heads up class.(Drag radial, outlaw 10.5 etc) It was meant for cars that did not want to upgrade to the new (at that time) 25-5 chassis cert. Although now almost all the cars are certed 25-5 and yea they are all mostly 7 and very low sec cars. not too many REAL Street cars in this class though.