08-27-2019, 07:32 AM
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Ultimate Warrior
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Join Date: Jan 2004
Location: La., 67 GTO, Original Owner
Posts: 6,720
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POR 15 manifold grey is the best I've found.
Doesn't even smoke on first heat up. Stays for years.
b-man put us onto it;
See post 4 here
https://forums.maxperformanceinc.com...haust+manifold
Last edited by Old Goat 67; 08-27-2019 at 07:38 AM.
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