🔥 Derale 16918 12" Diameter H.O. Extreme Electric Fan: Powerful Performance in Sleek Black Design Review

So far this has worked great for a 4 cylinder engine, it's cooled. We'll find out later this year how good it is in the summer heat.

The fan does not have a relay harness as indicated in the description, it also does not have 2 speeds of operation, since there is only one plus and one minus wire. Rated at 1500-2100 cfm I highly doubt it. I used it to replace the stock 840cfm 10" fan on my sxs. Not only does it not let as much air through, my car will overheat with a clean and properly installed radiator.

I have a '66 Chevelle with a 383 stroker, an aluminum heatsink and two 12" fans. I had cheap fans on ebay that I figured might keep the car cool. Weather in California. I bought them, they look like they are from Spal. Now my car goes from 210 degrees to 190 degrees when the fans turn on in a minute. I am satisfied that they are not noisy.

The product was as advertised. It spins at an alarmingly high speed, moving a lot of air for the 12-inch fan. However, after installing the fan I checked the direction of the airflow as you can connect them as a pusher or ejector and sucked in so much air that I couldn't be sure of the direction. Let's just say the lack of a shroud around the fan itself is dangerous. I brought my hand a little closer than I thought and he cut my thumb off the side and I cut my hand and thumb in multiple places…