Your car has more power with its mods, pure and simple. He paid more money because his car is newer and a Cobra. An off-road h-pipe and air filter is not going to give his car much. The gears, 3.55, doesn't help much with his engine either. Being that I've owned both a 95 Mustang GTS and a newer Cobra, I would say he still has the better car. My supercharged, h/c/i 95 was faster than my Cobra as well.