MACK , (USED) 2003 Mack AI-400 Diesel Engine (NON EGR MODEL), Serial # 3C1955, 400HP, Part # 5552M 3058 0944, Engine Family # 3MKXH11.9V65, Low Miles, Test Run 7-12-17. Visit Our Website for more information on this and any other Diesel Engine you may be looking for. Call . INV # 003417