Quote:
Originally Posted by SCOTI
Heat for sure. Mine are ceramic coated & still put off some serious temps. I haven't had any issues on the noise level though. Are they louder than cast iron manifolds? Yep. But I don't notice any difference w/the hood shut. I also ground the head flanges true & made my own 3/8" thick collector flanges so zero leaks vs. the repeat leaker on my exhaust manifolds (pass side).
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I know I did ceramic coated in my 67 to help with the heat issue but i don't think it made any difference. All in all if you keep the wires away its not that bad.
Thanks for your input!