1992 Mack E7, Truck Delivery, Engine Assys, Fits to: Mack DM688S, (Used) 1991 Mack E7, ENGINE ASSEMBLY- Displacement: 12.0L, Horsepower: 250, ESN: 1K1054, E.C.S.: ASPL, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921, Horse Power 250, Serial# 1K1054, Casting# 1K1054 1M2B218C6NM002581