I believe it has the starter upgrades as far as normal headers exhaust cold air and dyno tuned. I however see its normal stock tires and it was said to dyno at around 630hp. could I get a direction on what is the widest 18/19 inch rimmed tire I can fit on this lady. Also driveshaft I have been told DSS aluminum is this a route i should take. Future upgrade would be a whippy 3.4 or 4.0. .. Just a guy new to the gt500 owned 03's but this is all new territory 5.4l im excited.