I would buy the heat wrap for the headers, and spend the money on a Turbo Jacket, this is WAY better than trying to wrap it yourslelf.
get the 50m rolls as its cost effective that way,
Oh and try to get copper wound, not the cheap stuff, i promise its better!
Whoops forgot to say get the wide stuff, and over lap by 1/4 dont over do it, youll just waste it!!!