gold reflects infrared and heat rays, nasa uses it on their satellites, so maybe a gold alloy coating for high temp? booya
just buy the blanket, you might even be able to hook it up to an external battery and some equipment to reverse the heating process.
unabomber might be right about it being cheaper to make your own wrap, but everyone has a different opportunity cost. In the time some people would spend reading forums, taking off the turbo, and making this thing they would have earned enough to just buy the blanket and have someone do it for some flo
unless they are china crap clones that dont fit worth a damn like motorcycle abs plastics, then doin it yourself is way better. to each his own.