2013 V6 W/ Performance Package Has Steel Drive Shaft?

The front brakes on the Performance Package are the stock brakes from the GT Mustang's, can't recall the size though...

Since the Performance Package comes with the 19" wheels, you get the "awesome" air pump/Fix-a-Flat option instead of a spare tire. I do not know for sure, but I assume a 18"/19" spare will not fit in the spare tire wheel.

Not that it is likely, but is your Mustang a base model with the Performance Package? When the dealer ran the VIN, assuming correctly, maybe the system came back with the car being a base model and not a Performance Package?

GT's and V6's come with steel driveshafts. Shelby has carbon fiber, and I'm not sure what the Boss has. If you plan on doing any kind of spirited driving, I recommend that you change the driveshaft to an aluminum (or carbon fiber if you want to spend the money). I've seen videos of 3.7 cars grenading driveshafts during dyno pulls.