some of these "rules" that these types of events have, seems to cater to one, or a select few cars, to insure they win.....
they seem to have rules to exclude other legitimate cars, so they help insure certain cars will win. stuff like limiting the amount( one vs twin) or size of turbo, limiting the amount of nitrous stages, tire size, electronics, etc.....

i once saw a guy not able to race, because his interior didn't have...... CARPET.
car had a factory dash, with a bunch of gauges all over, two ( race) seats, this car even had a radio.... but no carpet, nope, can't race, it's not "full interior"

526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!