These are Halls big bore headers. If you are going to do work to them, why not put real collectors on them so they work like they are supposed to do?
The ceramic coating is for functional reasons. It's a secondary benefit that they look so nice done.
The coating is fairly thick and I was concerned that mine would show all of the pits in the tubes.
It doesn't. the tubes look a lot like mill finish stainless does and you see NO pitting in them at all.
I was also concerned that the interior of the tubes would have too much petrolium residue to hold the coating.
The people who did nine, Central Connecticut Coatings, said that they had a special soaking tank for them that removed everything.
There isn't even one fish-eye on mine.
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