Aluminum Underdrive Pulley Set for 1979-1993 5.0L Mustangs.Increase your engine horsepower by reducing the amount of power required to drive external accessories (i.e. alternator, power steering, water pump, air conditioning, etc.), with this set of aluminum underdrive pulleys.
By replacing factory-sized crank and accessory drive pulleys with re-sized aftermarket pulleys, the accessories are slowed resulting in more rear wheel horsepower. Set features three pulleys with a clear polished finish and stainless steel hardware.
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