It might be for the best to go back to stock until you tune. I do not know enough about them to be sure, but if you chose the wrong filter it may be restricting flow.
Nothing without a tune. Luckily, a tune from Bad News Racing is pretty inexpensive and the gains are significantly more than you'd get from an intake.Well I do live in Denver lol but sweet I didn't know that. Anything I can do though to add little power for cheaper?