Ok, now that the feedback has suggested covering the headers/exhaust pipes, I looked at some of the suggested sources. I found a wrap made from "pulverized lava rock":
http://www.designengineering.com/cat...-lr-technology
The description says, "DEI titanium exhaust wrap with LR technology is constructed from pulverized lava rock, extruded into fibers, and then woven into a tight weave, giving it titanium-like strength and toughness... is capable of handling direct continuous heat up to 1,800 degrees F and radiant heat up to 2,800 degrees F. And because it's pliable, there's no need to wet the wrap when wrapping headers or pipes, as many do in order to make the wrapping process easier to manage and to get a tight wrap. Titanium wrap will not shrink, and because of its material structure, it is more resistant to temperature and vibration breakdown, abrasions, and chemical and hot oil spills than glass fiber wrap."
Does anyone have experience with this product? Does it work well?