2011 Cummins ISX, Truck Tractor, ECMs, Fits to: Kenworth T660, (USED) 2010 CUMMINS ISX12. ECM- Serial Number: 9879, Part Number: 4993120, ESN: 79458239/ 79427134 Family Number: ACEXH0912XAP Engine HP: 450 CPL: 3490 For more information about this item, give us a call. We ship worldwide!(CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921, Serial# 9879, Casting# 9879, Truck Year 2011 1XKAD49X5BJ284551