Engines | Mounts, , (USED) 1988 Caterpilllar 3406B Diesel Engine with Jake Brakes (Air to Air), Serial # 4MG21048, AR # 9Y2338 425HP @ 1800RPM, Low Miles, Test Run 11-3-15, Fully Inspected!!! Runs Perfect!!! Visit JJREBUILDERS.COM for more information on this engine or any other diesel engine you may be looking for. Call 1-800-971-3019. INV # 002706