I was just browsing around the forum and figured I'd ask for some suggestions for my dad's '04 Mach I. I don't see very much advertised for bolt-ons for the mach's as you do for the cobra's and GT's and need some opinions. So far he has a JLT intake, UPR X-pipe, MAC mufflers, 4.10's, a RAM Clutch, Pro 5.0 and is tuned making 316hp (I forget what the tq was). He eventually wants to supercharge it but I think I've convinced him to go built w/ heads & cams once it is paid off (which is soon), but that will still be in the future. What are some other worthwhile mods for the mach's? He does run it at the track on occasion when we have track rentals and will most likely start coming with me to some test & tune nights when I get home.