Damn shame you got an 04 (sort of), because I'm buying HP Tuners for the '03 Z06 here in the next month or two. (This software can eliminate the CAGS Skipshift Mowgli was referring to, along with reflashing your entire VCM. smile.gif Otherwise, the tuner could be used on both cars (it's locked to certain model years). Anyways, Congradulations on the new car. Hope to have one within the next month or so.