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Take another shot a little farther back so I can see where those 2 hoses on the right are going. It looks like a coolant divertor valve.
Leave a little more info on year of car.
Looks like a heater shutoff valve but with an extra nipple.
That was my thought, but I cannot find one listed in the Doc Rebuild catalog, which normally has everything with good illustrations. It looks stock to my amatear eye, but who knows. I wonder where the coolant goes when the valve closes.
I'd wait till the car is cool and tighten all the clamps , start it and look at it , it may leak cause of a crack ! Have someone switch from cold to hot inside and see if it moves ok, Ron
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