1) When you get exhaust headers ceramic coated do they do the inside as well
as the outside? Do and/or should they also ceramic coat the surface that
meets with the intake/exhaust gasket? What if the headers have been used
already? Can they still ceramic coat the inside? Can they clean the inside
so it can be ceramic coated?
I recently had a new set of headers ceramic coated. It appears that the
inside was coated (at least as far in as I can see), as well as the mating
flange surface. My headers were never used, but had developed a little
surface rust from a few years of storage. They sandblasted them. I got the
impression that they sandblast everything they coat. Probably to insure a
good surface to adhere to.
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