I finally installed a AEM Brute Force intake on my 4.7 today. The directions were easy to follow and not to hard. It sounds great! Not much at idle. You have to stomp it to get it to sound off. My wife went for the first drive with me she was slightly irratated...I would stomp it slow down and do it gain! The best part was a couple young kids waiting at the light. I got into it and they looked to see what was growling...it was not a mom's suv for sure! I'm on a role, tomorrow my lift goes on.