Skip to main content
Gerry | Vanagon
Checking account...
← vanagon.com home · Continue the discussion in the forum
VanagonEuroVan
Subject:Re: When & why replace heads? A Friday Dennis Discussion.
From:Dennis Haynes
Date:Fri, 7 Apr 2023 23:33:39 +0000
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Have something to add on this topic today? Revive this thread in the forum »