I used the sound deadening sheets (2 Layers Thick) from LMC beginning just under the jute firewall pad, to under the gas tank. It helped. But there needs to be more, so I am going to get some insulation soon to combat noise and heat. The seat is coming out anyway to cut a big hole in the floor to accommodate the high hump, so why not add more stuff to the floor while I'm at it, right...lol...