Well he says his friend has a GT, but what does he have? If he has a GTP, then he has something to worry about. Mods are always based on MONEY. If he doesn't have it, he can't do it. I've talked with a lot of people on this site that know what they want to do, but have to save to do it. Family comes first.
But if he has a GT, then a K&N filter and a "chip" are not going to give you enough to make a that big of a change. His friend could have a freek.
My GTP wasn't fast for a GTP. But it is now. And the GTX is getting there. If I don't end up in the poor house first.