A cold air intake without a tune doesn't do anything. But still you can't expect a significant power increase out of it unless you go with a force induction . Jeeps are not race cars, the oem air intakes are less restrictive and tuned to optimize the performance.
But if u r looking for more sound from under the hood, then go for it. I have one installed in my jeep(experimental) . But i don't notice any performance gain , may be its too minimal to notice and that too in higher rpm where you don't drive often, though they makes a lovely throaty sound.