2016 PACCAR MX13, Truck Tractor, Engine Assys, Fits to: Peterbilt 579, (Used) 2015 PACCAR MX13, ENGINE ASSEMBLY- Family Number: FPCRH12.9M01, Displacement: 12.9L, Horsepower: 455 ESN: Y076317, Part Number: 2000826, 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# Y076317, Casting# Y076317 1XPBDP9X7GD298229