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  • Title: I have yet to figure out the meaning of the GM4. It may indicate the casting plant that produced the intake manifold. Anyone know about that? Let me know.
  • File name: IM000353.jpg
  • Owner: Gallery Administrator

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At first glance you might think that these freeze plug holes are there for freeze plugs. Well such is not the case. They are also there to help break up the inner sand cast molds that keep the cast iron where it belongs.

I have yet to figure out the meaning of the GM4. It may indicate the casting plant that produced the intake manifold. Anyone know about that? Let me know.

  • Views: 720
  • By: Gallery Administrator