It probably won't.
Ferrari is a manufacturer that is very averse to aftermarket modifications.
The widebody of the 458 was removed in the FH4, probably because of their complaints.
Formula Drift 599 is a competition vehicle. This is probably why we were able to add this car to our game.
However, Ferrari does not seem to take kindly to this car.
On the official Forza website and in the FH4 game, the car does not claim to be a Ferrari.
Ferrari once demanded that Koenig-Specials not use the Ferrari name on their cars. Perhaps something close to that has happened to this car.
Most likely it was licensed through the racing team, which is a fun loophole that's been used in many a game over the years. Since the car is usually only loosely based on the production vehicle it's based on, it's technically "manufactured" by the racing team. And I would imagine that even if that 599 started out life as a factory Ferrari, there's not much left at this point that's still factory stock.