OT: Wait a minute!
STU will follow the STX rule set, but will raise the displacement limit for otherwise STX-legal vehicles to 3.1 litres for forced induction and to unlimited displacement for natural aspiration. To accommodate the greater power of these vehicles, restrictions on wheel width are lifted and the maximum tire width will be increased to 275 for front or rear wheel drive vehicles (but will remain at 245 for AWD vehicles)
lol, what were you and rob trying to do?!