Join Date: Nov 2004
Location: Pacific Northwest
If you coat your common lower price point aftermarket stainless headers, and ever have a crack (and it's when, not if) that needs repair, sorry charlie....
It's simply not possible to debride the base metal of the coating media thoroughly enough to get a weld of a character and quality that's worth doing, it's new header time.
The cost vs. benefit relationship doesn't pencil out to me.
On the subject of headers, perhaps Kevin will weigh in with his experience on a realistic service life of the garden variety headers from B & B and GHL, vs. other custom headers fabricated with superior alloys, or even inconel.