Wrapping Headers

Engine bay heat is my concern i have chrome plated TTI's and do some street driving. If it keeps the heat down then I will buy headers every few years. You all know how hot it is in Florida LOL! So how much will i need?
:book: I just got thru doing this to set of used chrome 2 tti`s. gotta good deal on them, he had them wrapped to start with, but it was oil soaked,(he blew an engine using nos). I rewrapped them w/ new black 2" . It took 130 feet, and that was barely enough. be sure to wet the stuff down and keep it wet, wear long sleeves and pants too. couldn`t do it w/ gloves on due to wanting it tight. leavem in the sun to dry, then paintem w/ hi-heat paint, the more the better-to a certain point----bob