I am thinking of replacing my stock fan, I was wondering if there are any suggestion from you guys, and what are the benefits from change from a stock fan?

 

I put on an electric fan - the Flex-a-Lite Black Magic. Got if from Summit Racing for about $180. Everything is included - it has an adjustable thermostat. Search back for some of the older threads for more info - you have to rent or borrow a tool to remove the stock fan clutch. Engine runs plenty cool enough, even in summer with AC on climbing mountains.

In theory you get better mileage, more power and less noise since the fan isn't always on.

I didn't notice any power increase. My mileage varies a lot depending on driving, but my best guess is the electric fan improved my mileage somewhere around 0.5 - 0.75 mpg.

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1999 XLT S/C, 4.2 V-6, auto, 3.55 rear, dark torreador red/harvest gold, Ford bed liner

Clarion ARX8570z Head Unit, Sony 10 disc CD, Infinity 610cs components & JBL GTO7520 speakers; USAcousitcs 4065 amp and Polk 8" subwoofer

Edelbrock IAS, Energy Suspension anti-sway bar bushings, Steeda Rear Anti-sway bar, 2" rear drop.

Superchip, Airaid FIPK, Flex-a-Lite Black Magic electric fan