Yes it will give a nice sound and will increase horse power and possibly gas milage (if your light on the skinny peddle) but not much. gas milage maybe 1-2 more mpg and the k&n cold air intake only gives about 7hp at higher rpms. does it help? Yes does it sound cool? Yes is it worth the money? Depends... If you buy the k&n kit that's like $200 like me lol I'd say no it's not worth the $ but if you make your own with a k&n cone filter or any brand cone filter for that matter it's worth the $ they can be made for a fraction of what the k&n kit cost.
"****, I might **** around and bring the Jeep back No doors on it, flexin' with the seat back"