For what it's worth:
One header coater told me that they don't coat the inside because of the remote
chance that the coating may separate from the header. I 'think' he said that
internal adhesion is more difficult to achieve due to the difficulties of
sandblasting properly internally.
RD
> >
> > Hello all, I just finished reading an article about exhaust wrap which
> > basically said it would severely shorten the life of the header.Inother
>words,
> > "don't use it". Any thoughts out there? How about the coating for both
> > the
> > inside and outside of the pipe that I see advertised? Some kind
> > of ceramic ?
> > Summer is coming on and I need something to keep the heat down.Bob C
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