I did mine today with some dynamat that I reccomended to some guy. His car died before it was shipped to his house so he just gave the roll to me. I had the whole truck assembly removed cuz I went to the track so I did everything from the front seats back....very noticable. Car sounds much quieter inside. very nice

 

I second that I used 80 sq ft of second skin audio's damplifier. www.secondskinaudio.com

I did the entire trunk everywhere, 2 layers on the inside and outside door shell, the back of the door panel. I should have done the rear wheel wells and under the backseat along with the trunk lid. That's what would I reccomend.