If it is a true Formula S, it would have a factory Tachometer to the left of steering wheel, larger 14" wheels, also wider rim 5.5", cut out in the rear valance for the Factory exhaust tip, 1" diameter front sway bar, also the fold down panel in the back would have a funky cut out to allow the larger Goodyear Blue Streak Spare. Of course, these could be added, but from your pictures it appears as if your car is not a Formula S car as it does not have the valance cut out for exhaust. I hope i was of some help, perhaps someone else may be able to shed more light for you.
