2001 Cummins ISB, Truck Delivery, ECMs, Fits to: Freightliner MT55 Chassis, (Used) 2001 Cummins ISB, ENGINE ASSEMBLY- Serial Number: 5040902, Part Number: 3990517, Horsepower: 185, ESN: 60293517, Engine: P-30641, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921, Serial# 5040902, Casting# 5040902, Truck Year 2001 4UZAA5BW21CJ05022