Yes, teflon will hold up to very high heat. I had problems with the
head-pipes coming loose, and oil making messes on the cylinder heads.

The teflon tape fixed all the problems at the same time. I was afraid the
threads would get beaten out of the head, with the head-pipe getting
loose.

Remember to retighen the nut after each flight (3 or 4 times) until the
threads "bed-in", and it stays tight.

Dave.