(Used) 2021 Cummins ISX12N, ENGINE ASSEMBLY- Natural Gas Family Number: MCEXH0729XDA, Displacement: 11.9L, Horsepower: 400, CPL: 5726, Serial Number: 75096848, Part Number: 24063620, E.C.S.: TBI, TWC, ECM, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921