you can get it from Anderson Ford Motorsports it is a piggy back programmer you can tune for any mods your car has and you can change the tune if you change something on your can with without pulling and sending chips off for reburn....it cause bout a grand but it will be the last programmer mustang owners will ever need....heck go check it out at
www.andersonfordmotorsport.com they have it for 4.6L and 5.4L and 5.0L and 5.8L they cover all years of the fuel injected mustang...