like stated above. All of these mods, except for chip will actually increase you gas mileage, especially the CAI by CTA and the exhaust, just dont get to big of a pipe when doin your exhaust, single 2.25 or maybe 2.5 will be fine.
The only reason I say chip will hurt you in gas is becuase it requires you to buy a higher octane level of fuel, because of the affected timing. It may help you get better gas mileage, but you are paying more for gas, so you prolly will end up spending the same, if not a lil more...
