Anything that would increase the perfomance of the car in any way would be great. Turbo, 6speed, big brembos, recaros, lowered/tuned suspension, exhaust, intake,......I think you get the idea.
Sounds like the perfect SVT model 'wink wink'
"And with due respect to the Mustang Cobra, we think this car [the SVT focus] also adds up as the best thing the SVT consortium has done to date." - Car and Driver