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
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