This push rod is designed to fit Cummins engines K19, K38, and NT855 QSK. The OE/OEM part number for this set is 3017961, and the manufacturer part number is also 3017961. These push rods were made in China and are compatible with a variety of valvetrain components. They are a great addition to any engine or engine part collection, and are sure to help with the proper functioning of your Cummins engine.