I agree with most here that the HP gains are not going to be outstanding, but I think if you want all out with the CAI, throttle body, exhaust and engine/trans software, there would be a fairly decent difference in acceleration and engine response. It would run you some dough though and at that point the supercharger may look like the better deal.

Does anyone here have all or most of those mods on a 4.4i that can compare it to a 4.6is?

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Profeshenal spellar