"Edelbrock USA
Edelbrock produces all of our cast items right here in the USA at our two state of the art foundries. You can be assured that when you are purchasing an edelbrock casting it is the best quality available."
...we are proud of our casting and manufacturing facilities - all of which are located right here, in the USA. Edelbrock's permanent mold and sand cast aluminum parts take shape in two of the most modern high-tech foundries in the Western United States.
The Edelbrock Foundries located in San Jacinto, California, prides itself on its quality and efficiency. The 185,000- sq/ft. complex is capable of producing over 3,000 castings a day.
With three automated molding lines, 26 core machines, a new state-of-the-art cold set core machine, and a self-contained sand handling system that is capable of processing 100 tons of sand per hour, the Edelbrock sand foundry produces some of the finest castings around."
well, the finest castings is debatable, as in how could that core shift leave the factory? Their cylinder heads are not sand cast any longer, they are permanent mold castings now.
There was a "how its made" where they followed an MP intake (cast by Edlebrock?) from scrap AL to finished product.