Engines | Mounts, , (USED) 1991 Caterpilllar 3406B Diesel Engine With Jake Brakes (Air to Air), Serial # 3ZJ, 425HP @ 1800RPM, Test Run 2-12-16, 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 # 002800