should I put on header wrap

I ordered Doug thorely long tube headers and was wondering if I should put header wrap on or just put them in like they are, also I have the supercharger so I don't know if that will make the headers hotter

 

Since they are 304 stainless headers, you can. But if they were mild steel, I wouldn't.

Better bet would be to have a high quality ceramic coat done to the headers. Poldyn.com or Jet hot. Something like that. They won't likely be any hotter as they are, than the OEM headers. Likely a little cooler since there aren't any cats which restrict the flow and heat up for what they are designed to do.