Here’s some pics of a couple heavy duty industrial bolt-on radiators we are rebuilding with new cores. The radiator with the crankhole in the core is for a garbage truck. The new radiator core with the blank headers is for a diesel pusher RV motorhome. Recoring both radiators with new heavy duty cores was recommended after evaluating the condition of both radiators and our customers agreed to our recommendations.Motor Mission Machine & Radiator(702) 649-2366