91crew
Full Access Member
I can see the moisture trapped under the header wrap being a problem only if your truck sits for extended periods of time. Otherwise, the heat will dry it out.
anytime you can keep the heat content in the exhaust it's a good thing.
BUT in the real world, wrapping the pipe has a potential downside....moisture gets trapped and your pipe will rot out.
as a result, I'll give up a little so my turbo system will last a little longer.