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Old 03-21-2024, 08:22 PM   #4
Steeveedee
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Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,164
Re: Old Style "Rams Horns" Exhaust Flange Donut Gasket

At the age of the manifold, it may well be pitted enough to allow a leak, even with the doughnut. I had a Buick like that, and used some exhaust system sealer. Of course, it was metal to metal, (which gaskets still didn't help). I got it at O'Reillys.
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'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper

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