I have a few heat blankets that were made for aircraft application but never used. I am using it as a heat/sound shield on the firewall with good results. I do not know the temp rating so I would not lay them directly on an exhaust but they could be screwed to the bottom of the body above the exhaust to reduce heat transfer. There are two style of blankets. One is approx. 2'x3' the other is a long narrow blanket that is about 1 1/2'x4'