2018 PACCAR MX13, Truck Tractor, Engine Assys, Fits to: Peterbilt 579, (Used) 2017 PACCAR MX13, ENGINE ASSEMBLY- Family Number: HPCRH12.9M01, Displacement: 12.9L, Horsepower: 455, ESN: Y145294, ECS: 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# Y145294, Casting# Y145294 1XPBDP9X4JD486326