I used Damplifier regular in the rear doors (so far) of my '05 Titan. It's awesome, sticks like friggin' mad! You can easily cut it and stick anywhere and everywhere you can possibly reach. Deadened my doors great. I even stuck it on the inside of my plastic interior door panels, just because I had plenty leftover and wanted to make sure they wouldn't resonate or vibrate either. I paid about $50 for 10 sq-ft (five 1'x2' pieces), which kinda seems like a lot to me for what it really is, but I'm satisfied. I'll be buying another pack for the front doors soon.My truck rattles like crazy with my new setup. I can't stand it. I NEED a good deadener to stop most of this vibration. I've done some research and I'm sold on Damplifier, Damplifier Pro.
I'm just one of those people that never pay MSRP or Asking Price for anything.