CATERPILLAR , (USED) 1991 Caterpillar 3406B Diesel Engine w/ Jake Brakes (Air to Air), Serial # 3ZJ, 425HP RATED, Test Run 4-18-17, Fully Inspected!!! Runs Perfect!!! Visit Our Website for more information on this engine or any other diesel engine you may be looking for. Call . INV # 003218