[drakkhen_20]

What or how far can you modify these new 2007 Mustang GTs before you have to start reprogramming the computer?Also im trying to learn as much as can about these new Mustangs(Mechanicly i mean) so is there any sites or books you could get?

[coolwaterblvd]

From what I have seen with the new ones is that u need to almost tune it or put a programmer on it for almost anything u put on it like cold air, exc, except for like mufflers.