2011 Cummins ISB 6.7, School Bus, Engine Assys, Fits to: Thomas Built Saf-T-Liner HDX, (Used) 2010 Cummins ISB 6.7, ENGINE ASSEMBLY- Family Number: ACEXH0408BAH, Displacement: 6.7L, Horsepower: 220, Ar.No./CPL: 3071, Serial Number: 73088316, Part Number: 165307, ECS: EGR, PTOX, 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 220, Serial# 73088316, Casting# 73088316 1T7YN4E25B1137943