2019 PACCAR MX13, Truck Tractor, Engine Assys, Fits to: Peterbilt 579, (Used) 2018 PACCAR MX13 ENGINE ASSEMBLY- Family Number: JPCRH12.9M01, Displacement: 12.9L, Horsepower: 455 Serial Number: Y157544, ECS: DDI, TC, CAC, ECM, EGR, 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# Y157544, Casting# Y157544 1XPBDP9X2KD364193