I'm at the same point ... Looking for something that has a good mix of insulation properties and sound deadening ... I'm sure technology has come a long ways in that regard in the last 50 years. Can't decide between the super dense type stuff, or the lighter stuff that insulates better.
In general I lean towards better insulation, the car is stock so not a lot of exhaust noise, and it has AC so I'd rather live with a little more noise, less heat if there is an option.
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