you are also comparing a 2v to a 4v. take an 03 gt and an 03 mach 1, there IS a big difference. 96-98 2v and 4v were WEAK. my brothers buddy has a full bult on 2 valve (gt) 97 and i was a car or 2 behind him at the track when i had just intake. 99+ have a stronger motor. 01 cobra, which is the same setup as a 99 cobra, 13.4 on drag radials.