The Flex-a-lite Black Magic Xtreme #185 Mustang 5.0L fan is a bolt-on electric fan made to eliminate the stock clutch fan in the '79-'93 Fox Body Mustangs. Pulling 3,300 cfm, the Black Magic Xtreme is one of the most powerful single fans on the market. This fan will help keep your engine cool while at idle, and give you some extra horsepower while driving, either on the street, or at the track. Comes with an adjustable temp sensor and A/C relay.