I used some of the pipe insulation foam that is basically a split foam tube that you use to wrap the pipes under your house to keep them from freezing. I used the smallest ID I could find, and then wrapped that with some of that metal duct tape - not the cloth stuff, the real METAL tape that you use on AC ducts. That stuff made all the difference - the foam would shrink and blister without the tape, and that fuel line is about 6-8" from the headers.

Clair