(GOOD USED/ RUN TESTED/ FULLY INSPECTED) 1999 Caterpillar 3406E Diesel Engine (2WS), Serial # 2WS37683, AR # 171-5197, 475HP @ 2100RPM, Short Block # 10R1511, Long Block Part # 20R6605, TEST RUN WATCH VIDEO ON JJ REBUILDERS WEBSITE!!, Fully Inspected!!! Runs Perfect!!! Visit JJREBUILDERS for more information on this engine or any other diesel engine you may be looking for. Call (844) 385-8503. REF INV # 005063