DrC
Yes, I used Dynamat Xtreme for both sound and heat. I purchased it through Summit (#DYC-20455) 9 sheets 18" x 32". It has an adhesive liner and is very easy to cut and intstall. Cut to fit, peal of the backing, stick in place, and use a roller to smooth out any rough spots. Then just use 3M super adhesive and glue on the carpet. I did the firewall, footboxes, floors and trans tunnel. It took almost all 9 sheets. I haven't riden in to many other cars, but I can easily carry on a normal conversation with my wife while driving, but can't talk standing outside the car due to exhaust noise. I have a pic in my gallery of the installation before carpet. Heres a link:
http://www.clubcobra.com/photopost/s...cat=500&page=1
Brad W.