Roush mustangs are along the same line as a Saleen, Steeda, or Kenny Brown mustang. They are shipped to their shop and they add their 'package' to it. The Roush mustangs have been mostly handlings and styling up to this year, a supercharger is now optional. I think they advertised about 10 more hp than stock in the past years because of the performance exhaust(I think it 2.5"). If its one of the new ones with the blower, I'd be careful if I were you
. If you want more info on the roush car, they have a site. I think its
www.roushperf.com or something to that effect, I'm not real big on them but I have seen all four specialty cars (on the same lot). Just search Roush Mustangs, that should enlighten you. Good luck at the light
.
Rick