I had a local powder coating shop redo mine from the stainless to Satin black.
They used Cerakote (Black velvet C7300) which is an air cure.
https://www.cerakote.com/shop/cerako...lor=cera_black
Any paint shop or you can do the shooting. I chose the powder coater as they had their own bead blasting equipment.
The Cerakote site shows two applicators' in your city but only appear to do weapons. One says he is a master ase mech so maybe he delves into exhaust / pistons etc...
Total cost was $320 for headers and side pipes.
My quote from Jet hot was $1750 and that did not include me crating and paying shipping both ways.