Great info Nevin. I like the dynaliner. I sprayed the outside of my firewall with lizardskin. I think, after looking at your pictures, that I will put fatmat vibration insulation on the inside and put dynaliner on top of that. I read on the dynamat web site that dynaliner can be used under the carpet as a carpet pad. Seems like that might be a good solution to the floor heat from the exhaust problem. Any thoughts?