Allstar Performance ALL30076 16" 1820 CFM High-Performance Curved Blade Electric Cooling Fan - Perfect for Automotive Radiators, Racing Vehicles & Engine Cooling Systems

The pic shows small tabs on the outside of the fan that suggest it could be mounted without the tabs. I prefer to not go through the radiator because Im worried about movement that can lead to future leaks. I wanted to make a custom mount that stretched to the outside. I ordered it knowing those mounting holes might not exist based on pics from other sites. It came with the standard through the radiator mounts. I mounted it and it worked fine. The instructions that I received showed a slight difference in the pitch of the blade which shouldn't matter unless its being used as a pusher fan, which I was. I had to swap the direction of the blade, and wire it backwards. It works fine except the deferred airflow is noisy because of the diverter. When in doubt, order one with flat blades, but price and decent cfm made this practical for me