I believe the IT-7 attraction just begins at the street tires though. It seems like the group has fairly basic cars and are not taking the prep to the limits. Meaning they have modest build costs, not constantly trying to out prep the cars and seeking expensive HP gains. Assuming they continue to keep you out of the class (your car was on the other spectrum) and are able to keep that mentality as new people enter...that's the attraction at least in my perspective. We'll see how long they can keep those cars going and sourcing parts though.