Horton industries has been in business since 1967. They have produced over a million fan clutches. As the standard for most new truck manufacturers today, a Horton on/off fan clutch uses an air engaged / spring disengaged design to smoothly and consistently maintain optimum engine temperature. The results – maximum fuel efficiency, a quieter cab, up to 45 extra horsepower and easy maintenance even in the field the warranty is superb, with a 3 year or 324,902 mile warranty. As you can see they stand behind their product. Not only do they offer fan clutches, but they also offer all the controls to operate them and the fan blade as well.