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6 bolt head id

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hotrodssnova

10+ Year Contributor
694
46
Feb 14, 2009
Houston, Texas
Interesting markings on this head, I have 5 heads, 1 7 bolt head, and 3 6 bolt heads, and this head. It has 16-11 cast into the thermostat side of the head. None of my other heads have this marking.
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Anybody have any information?
I can't remember much about when or where I got it. But it is on a running engine and everything bolted up.
I have seen the g6 and the 2.0L
None of those marks here.

I will be pulling this engine Sunday and the head sometime next week. I will post my findings if nobody comes up with some information.

Update edit
It has the large ports and also the smaller exhaust studsat the corners.
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Last edited:
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