2013 PACCAR MX, Truck Tractor, Engine Assys, Fits to: Kenworth T660, (Used) 2012 PACCAR MX, ENGINE ASSEMBLY- Family Number: CPCRH12.9M01, Displacement: 12.9L, Horsepower: 455, Part Number: 1889959, Serial Number: Y0203220, E.C.S: DDI, TC, CAC, ECM, EGR-C, OC, SCR-U, PTOX, Reference images for condition, 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# Y020320, Casting# Y0203220 1XKADP9X2DJ364779