2014 PACCAR MX13, Truck Tractor, Engine Assys, Fits to: Peterbilt 579, (Used) 2013 PACCAR MX-13, ENGINE ASSEMBLY- Family Number: DPCRH12.9M01, Displacement: 12.9L, Horsepower: 380-500, Serial Number: Y030332, 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 380-500, Serial# Y030332, Casting# Y030332 1XPBDP9X8ED233600