Have you looked into HTC?
Edit.... I tried to google what I was thinking and came up with a host of places. Hedman headers uses a “HTC” coating on there headers and I thought they were located in Ct.
I’ll keep looking a bit. However. This is one place I found local-ish to you:
:: htcracing :: Performance Brakes
273 Weymouth st Rockland MA 02370
Here is Jet Hots:
Jet-Hot Coatings and Headers- Home
In Pa.;
Bonehead Performance
