I’m having 2 new exhaust manifolds ceramic coated after having the flanges trued by a machine shop. I have heard conflicting statements whether to coat the flanges or not. Not coating them would I assume transfer heat to the cylinder head, whereas coating them would put more heat into the manifolds. Any thoughts 🧐

1955 312 T-Bird Warwick, NY

I had the flanges trued and just got the manifolds back from MAC Powder Coating in Lagrangeville, NY. The owner Anthony told me I had two choices for maximum heat resistance, black satin or silver (up to 1800 degrees Fahrenheit). I chose the black, they look great, coated inside and out. He said to use 220 grit sandpaper dry to cleanup the flanges.

1955 312 T-Bird Warwick, NY