If you are going to wrap it with heater hose, I would recommend using silicone heater hose... It's more expensive than the standard heater hose, but can withstand 50° more temperature... Then put a heat sleeve around it, because even silicone hose cannot withstand the full heat of a header...
Aluminum foil is also a good way to protect it from heat... Put some aluminum foil on the outside of the hose and/or heat sleeve as an extra barrier......