i have a cowl (the space where the windshield fluid sprays out) CAI i have noticed a definite gain in power. it also increased my mpg from 12 to 17. it also makes the stock air box disappear. it moves the intake up as well for water crossings. it sounds like im selling you on it. but i would recommend it. it adds to the sound of the jeep if that matters to you. but the best is to pair the CAI with a Cat Back Exhaust you'll see better performance.