lots of options with different costs tied to them. I went with the Dynamat 10455. Worked out ok. I only put it on the interior floor and firewall. I might go back and do inside the doors at some point. As with any sound deadener, there is a weight penalty. a box is about 20 lbs and was enough to do the floor. I needed 2 more sheets for the firewall so all in about 22 lbs?