A Carb approved CAI is AEM.I installed the stillen intake yesterday. It appears to be a very well made kit that includes all the necessary parts including a K&N filter.The only dray back is its not carb approved. it was a very easy install about 45min.
so far so good its quiet at idle you don't get any intake noise till around 4k
then its mild. the power increase in slight. I noticed a little more low end at 2000 then no change till you bring the RPMs up around 3200. I commute up hill all the way home. I can say it pulls the hills better I can pull the hill at 65 in 6th gear all the way. before the intake i needed to drop to 5th in spots.