Twin City Die Castings, Minneapolis, produced a one-piece exhaust gas recirculating (EGR) valve housing for car and truck diesel engines that has features usually done with multiple die and sand cast components. The ERG positions and houses the valve actuator, maintains alignment, fixes the valve seats, and provides a sealing surface. It was cast in a two-cavity die with two stainless steel inserts per cavity and six core pulls. The stainless steel insert molding weighs less than a stainless steel cast housing, without sacrificing performance or durability.

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