i have done cai in a few cars/truck if you look at all these cai they are all basically the same shape size and filter i think they help but not at the claims they all make 20-30 hp gains come on no way 5-10 maybe how can one say they make like 15 hp more than the other like i said there all almost the same exact shape i have had the cheaper ones and the most expensive and could not tell any difference i would base your choice on filter cleaning i like the aem just for the filter easy to clean no oil, the ones that you have to oil are a pain in the butt if you use too much oil it will restrict some air flow,i only oiled mine like evey three cleaning's and it worked better....just my .02
ford,chevy