I used that same stuff for my CAI. Seems to help some looking at the data logs. It won't take rough handling, clamping/squeezing, etc as it will crush the air pockets defeating some of the insulation properties. It seems to hold up to heat pretty well, but open flames not at all. That close to the headers would keep a close eye on it for awhile to see how it holds up. I also used this stuff http://www.summitracing.com/parts/dei-010462 on my intake and it is holding up really well. Don't have any data to see how much it helped if any but the manifold does seem to stay cooler to touch than it used to. Not very scientific