Thread: 1969 Z/28 Camaro "472" Intake Manifold Expansion Plug
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Old 07-14-2017, 05:05 PM
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Edgemontvillage Edgemontvillage is offline
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I wasn't able to locate a new or suitable mint used expansion plug (1 1/4", steel, unplated, unstamped) so I contacted a small freeze plug stamping company who did a custom run for me. I have several.

New intake expansion plug stamping, 1 1/4" unplated steel, no mfg markings:


New Stamping vs Jobber zinc plated plug


Reverse side of factory original 472 manifold with expansion plug (unplated steel)
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