Because they are aerodynamic fiberglass bodies with aero splitters 1/4 inch off the ground, and their carb scoops are sealed to the carbs. Ever notice a pro-mod body doesn't even have a radiator opening?
I'm not starting an argument at all, just having some fun. I have a bachelors in Aeronautics, and I have been racing everything from Super-pro Rails, to 9 second street cars since i was 16... Im pretty confident that hacking the inner fenders out of a 12.90 car...will do absolutely nothing but make your plugs easier to change, and turn it into a 13.00 car. I could go into a long explanation of how low pressure zones and aerodynamics actually effect this, but again i'm not trying to be all high and mighty. It's just a scientific fact that cutting out the inner fenders WILL slow the car down in this instance. Marginally? Yes. But some, none the less.
