2000 Caterpillar C12, Truck Tractor, Engine Assys, Fits to: Peterbilt 379, (Used) 1999 Caterpillar C12, ENGINE ASSEMBLY- Family Number: XCPXH0729ERK, Displacement: 11.9L, Horsepower: 339 (455), Serial Number: 2KS11345, E.C.S.: EM, DI, TC, ECM, CAC, 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# 2KS11345, Casting# 2KS11345 1XP5DU9X8YD512903