2013 PACCAR MX13, Truck Tractor, Engine Assys, Fits to: Kenworth T660, (Used) 2012 PACCAR MX13, ENGINE ASSEMBLY- Family Number: CPCRH12.9M01, Displacement: 12.9L, Horsepower: 455, Serial Number: Y017254, ECS: DDI, TC, CAC, ECM, EGR-C, OC, SCR-U, PTOX, 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 455, Serial# Y017254, Casting# Y017254 1XKADP9X3DJ364905