(Used) Cummins ISB, ENGINE ECM- ESN: 55119L028, Engine: P-53705, Part Number: 4921776, Serial Number: 29021310, CM: CM850, E/C: Z90030.18, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921