Im using the standard damplifier product. Cant really tell you how it works since the car is not on the road yet. If you want to see it, check out the project section. I like the black foil, and if you double up in certain area's it should be equal to dynamat. The price is right, I did two boxes, no problem doing the floor, inside the doors and under the quarter windows,firewall, rear mini tubs.
Rich
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