2017 Cummins ISX15, Truck Tractor, Engine Assys, Fits to: Kenworth T680, (Used) 2016 Cummins ISX15, ENGINE ASSEMBLY- Family Number: GCEXH0912XAT, Displacement: 14.9L, Horsepower: 450, Ar.No./CPL: 4586, Serial Number: 79937528, Part Number: E6RCF3767L769U7977, ECS: EGR, PTOX, SCRC, 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 450, Serial# 79937528, Casting# 79937528 1XKYD49X2HJ165928