The problem is that most modern cars are already noise proofed pretty well

I may well be incorrect here, but I was under the impression that DynaMat was meant to dampen resonances and harmonicscaused by the speakers themselves (for instance, when installed in doors), not to insulate the interior of the car from outside noise.

Somebody please feel free to correct me if I am mistaken.

tanstaafl.

"There Ain't No Such Thing As A Free Lunch"