2016 PACCAR MX13, Truck Tractor, Engine Assys, Fits to: Kenworth T680, (Used) 2015 PACCAR MX-13 ENGINE ASSEMBLY- Family Number: FPCRH12.9M01, Displacement: 12.9L, Horsepower:455, Serial Number: Y077721, E.C.S: 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# Y077721, Casting# Y077721 1xkyap8x2gj494445