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10-26-2015, 04:22 PM
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Registered User
Join Date: Sep 2013
Location: Broken Arrow OK
Posts: 39
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Exhaust manifold question.
Some stock cast iron exhaust monifolds have a copper tube in the exhaust port, and some don't . Can someone tell me what this is for? I am talking about Chevy ramshorns from the 50's, 60's and maybe into the 70's. Thanks oleguy
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