The rules were updated and you can run an extended frame. I heard the idea for this class was suppose to be an "affordable" class. Custom frames, innercoolers, 24.5s,cages, the rules arent much different than the interstate light limited and I wouldnt call any of those affordable tractors. I do applaud the 466 limit. Finally someone got off the 540 kick! I know you cant please everyone. Im intetested to see how this class turns out this year.