2015 Cummins ISX15, Truck Tractor, Engine Assys, Fits to: Kenworth T680, (Used) 2014 Cummins ISX15, ENGINE ASSEMBLY- Family Number: ECEXH0912XAT, Displacement: 14.9L, Horsepower: 450, Ar.No./CPL: 3937, Serial Number: 79765652, Part Number: E6NEE0767G768T7974, 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# 79765652, Casting# 79765652 1XKYD49X4FJ449980