1. I got my wrap here:
http://www.british-customs.com/header-exhaust-wrap.html2. I wrapped the outer wall of the double wall pipe.
3. I would remove the pipes, it was easier to wrap them.
4. I started from the head end.
5. I used SS hose clamps on mine
5. Soak the wrap in water.
6. I let them dry for 24 hours and went over them with bar-b-que paint to seal them up (read that some where).
6. In about year and a half I repainted them again, they were starting to fade