Originally Posted by stevens243
Don't waste your money on TB spacers, CAI's, chips or any of that crap.
X2, the 4.0L doesn't respond to any of that. Well it does a little to the chip but only at extremely high rpms and wide-open throttle... not like it'd be driven except at the dragstrip and then it'd require higher octane fuel to prevent pinging.
Shy of a supercharger or turbocharger, the only real way to restore power lost to bigger tires or the added weight of offroad armor is to regear your axles to a lower ratio. Typical cost for that is $1100-1200 or so. That amount of $$$ would actually do something, spending $$$ for a throttle body spacer, CAI, chip, etc. would be a waste of money.