Engines | Mounts, , (USED) 2001 Caterpillar C15 Diesel Engine (Single Turbo), Serial # 6NZ44256, AR# 186-1889, 500HP Rated, MAX ADV 515HP, Test Run 10-6-15, Runs Perfect!!! Fully Inspected!! LOW MILES. Visit jjrebuilders.com for more information on this motor or any other diesel engine you may be looking for. 1-800-971-3019. INV # 002669