(GOOD USED/ RUN TESTED/ FULLY INSPECTED) 1989 Caterpillar 3406B Diesel Engine (AIR TO AIR) (Mechanical Fuel Pump), Serial # 4MG53074, AR # 9Y2556, 425HP @ 2100RPM, TEST RUN WATCH VIDEO ON JJ REBUILDERS, Fully Inspected!!! Runs Perfect!!! Visit JJREBUILDERS for more information on this engine or any other diesel engine you may be looking for. Call 786-377-5210. REF INV # 005674