18-1/4" Diameter x 2-3/8" deep, heavy-duty flex fan offers a unique design that allows fan blades to flatten out when sufficient airflow is present, thereby avoiding engine overload and boosting your mileage and horsepower.
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Perfect!!! Exactly what I wanted at a good price and delivery. Would certainly buy from these folks again.
excellent price for reverse rotation flex fan.
this fan works and fits perfectly and it is the only one I found to be a reverse rotating
model. etrailer was a great help in finding the fan
I bought this Derale flex fan for a 1999 F350 I use for plowing. I prefer to leave the plow mounted all winter, since it's such a pain to remount in a hurry for each storm. But the stock Ford fan clutch was too weak to drive the fan with the plow mounted, and quickly burned out - after which I couldn't drive more than 30mph with the plow mounted without overheating. After a while I drilled a pin through the clutch to get a hard drive for the fan which solved the overheating problem but replaced it with a belt slippage problem - couldn't rev the engine over 3000 rpm without slipping. Finally last year I replaced the stock fan with the Derale flex fan. PROBLEM SOLVED. Now I can leave the plow on all winter, drive 75 mph without overheating, and run the engine to redline without belt slippage. PERFECT!
Quality fan, easy install. This replaced my stock fan on my 1990 Chevy pickup with 5.0 V8. I plow with this truck, so I needed a fan that moves a lot of air at slow road speeds, and this one does. I know it works because my coolant temp gage is a bit lower. Not excessively loud either.
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