I’m adding wedge shims from Mark at Breeze and in doing so need to replace the bolts. The grade 5 bolts appear to have held up rather well.
My pipes are ceramic coated as are the headers
In doing this mod, my bolts are too short and need replacing.
My question is what would you guys recommend for fastener material understanding the effects of galvanic corrosion in using dissimilar metals.
If I use stainless bolts, do I run the risk of advanced corrosion on the headers if the coating is compromised?

Also I see that it’s recommended to use wide flange, serrated carbon steel nuts. Not liking the idea of using carbon nuts on stainless bolts. Also the serrated nut I would think will compromise the coating when torqued down cause of how it’s designed to bite into its mating surface.

For those of you who have miles on your car and ceramic coating, how would you recommend it be fastened for longevity?