Dynamat...Worth The $?

Run a search on this subject… there are quite a few threads on this it (see a couple below). I was looking for low cost option and used Home Depot version: Peel n' Seal. Affordable, works well and you don’t have to pay shipping.

http://www.forabodiesonly.com/mopar/showthread.php?t=278921

http://www.forabodiesonly.com/mopar/showthread.php?t=220476