2004 Mack AI 427, Truck Delivery, Engine Assys, Fits to: Mack CV713 Granite, (Used) 2004 Mack AI-427, ENGINE ASSEMBLY- Family Number: 4MKXH11.9V67, Displacement: 11.9L, Horsepower: 427, Serial Number: 3Y1737, ECS: ASPL, 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 427, Serial# 3Y1737, Casting# 3Y1737 1M2AG11C54M012959