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Casting Marks on Intake Manifold

Posted: Sun Mar 24, 2024 9:48 am
by RVA23T
What are the rectangle and dimpled inclusions on this intake manifold from or for?
RedInL.jpg
redInR.jpg

Re: Casting Marks on Intake Manifold

Posted: Sun Mar 24, 2024 10:22 am
by t-time
casting chaplets used to stabilize the core.