2001 Cummins ISB, Truck Delivery, Engine Assys, Fits to: Freightliner MT55 Chassis, (USED) 2000 Cummins ISB, Complete Engine Assembly. S/N-56751008 P/N-3944124 HP-185 CPL-5675 ECS-N/A Model-ISB185 For more information about this item call. We ship Worldwide. 929 W Pulaski Hwy Elkton, MD 21921, Horse Power 185, Serial# 56751008, Casting# 56751008 4UZAA5BW01CH64865