My car, '03 350Z is in the game of course, my exact model isn't. Plus I have custom wheels that aren't on the game either. I would love to drive my exact car, but I don't have brembo brakes on my car, so it wouldn't be much of a car in GT4.
Guess it depends on what you mean by exact car. The '03 350Z on the game has touring model wheels, with brembo brakes, something that wasn't actually available. In '03, the track model was the only model with brembos, and that model had lightweight Rays as wheels.
But I'm just talking about brakes and wheels here of course, in essence, it is the same car.