looking to make the cruiser somewhat less noisy and especially to create a barrier against the heat of the tranny and drivetrain. I used this insulation with what looks like foil on each side on my jeep. it did pretty good, but i am trying to decide whether to place it underneath or on the inside. The tub is ready to be rhinolined and thats how i really want it since its in pretty rough shape. I wonder if it would be weird to rhino over the insulation? anyone have ideas or done something similiar?