Im sure wide tired will not be from the factory, nor staggered setups either (at least on the first year models, maybe on a Ls8 model). I could care less about if it has wider wheels/tires, but I do care if it can fit wider wheels/tires. That was the beef with the GTO; you had to roll fenders and strut rub issues. I like to fit at 315 on a 18 inch wheels on the car without having issues with rubbing on a launch. I dont see it being a problem if the prototypes are running 245s on a 20'' wheels. Hell, I think the car could stand to be lowered on 315s; but I still like to know how deep the fenders are.