I wrapped my svt header with a roll of 2inx50ft dei titanium had about 6ft left, keeps the engine temp down and you don't need to seal it.
What I did was wrap one tube then measure how much I used for that tube, then cut 4 strips that length with 1 inch more and then you have like 20 ft left for the bottom.
Just make sure you have your bung welded in before you wrap it(or have a delete for the egr) I made that mistake, I only realized after I was done
and I had to re-wrap it and then the wrap was starting to fall apart so don't play with it too much.
My SVT header swap