I have these guards around my pipes and they only get to about 98 degrees. The header reaches 280 plus and the rest of the pipe hits around 220-240.
I can lay my hand or calf on the guard without a burn. Granted I just got the car and only had it out a couple of times, but each time I checked with a heat gun and it was always under 100 degrees.
https://vintage-motorsports.com/piwi...9/category/853