New Cummins ISX15 Cylinder Head (Fully Loaded) An all new casting with all new valves,valve seats, rotocoils, cam bearings, seals, springs, guides, locks, and injector tubes. The casting contains more nickle and wider water-ways than the original to combat overheating. No core is needed and it can be shipped anywhere in the U.S.A. No core return hassles and only one way shipping. New Cylinder Heads are packaged in a protective wooden crate and come with sturdy nylon lifting straps for secure shipping and handling. Our heads are designed to meet the high demands of your engine, provide OEM performance, and are reliable and affordable. Replace your old cracked cylinder head with our new and improved head. One Year/Unlimited Mile Factory Warranty.