( Used ) Cummins ISX, ENGINE ASSEMBLY- Family Number: DR1680-RX Displacement: 15L Horsepower: 450 Ar.No.CPL:8520 ESN: 60813282 Part Number: 4018419 For more information about this item, give us a call. We ship worldwide! ( CRG HEAVY TRUCK PARTS ) 929 W PULASKI HWY ELKTON, MD 21921