Doesn't have anything to do with what is or isn't a street car. It's about what they had for rules. The original rules were tagged 3400 for bb, 3200 sb and 13.50 x 30 et street was the biggest tire. Next thing you know there buddy has a all fiberglass lexan window car getting to run. I'm not stupid to run heads up against something that's 800 pounds lighter than me.they need not have so any rules. Tire size and weight. My car has no wipers ir radio and a funny car cage and is tagged and insured