Anything less than dynamatt extreme is wasting your time. This is scientificaly proven over and over again. Sure, go with the jaycar stuff...but in a week or so when you say your disappointed with the results i willl gladly say i told you so. Check the tut section over at MEA for the sound deadedning topic....
Btw, Dynamat extreme can be picked up for the 200ish mark for 36 square feet. This will get your doors, boot and probably your firewall done
-Eric
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