CUMMINS ISX12, (GOOD USED) OEM 2012 Cummins ISX12 Diesel Engine Computer Module, ECM, ECU, for sale!!!!! P/N: 4993120 4993121 CM2250 CPL3438 400HP Stock #: E1956 For more information about this listing, shipping, technical questions email us at sales@jjrebuilders.com or