About Hilliard

  Founded in 1905, The Hilliard Corporation is well known for high quality industrial clutches, brakes, and filtration. We have applied our years of industrial experience to design new high quality clutches for the racing and recreational markets. More information about The Hilliard Corporation can be found on our corporate website. [Click here].

Gear Ratio Calculator

We have created a tool to help you determine if you have the proper gear ratio in your kart. You can download it [here].

  Read the National Kart News feature article on the Hilliard Inferno Blaze clutch [here].

  Read the article on the Hilliard Inferno Flame clutch [here]

  Read the National Kart News company profile article on the Hilliard Corporation [here]

Extreme Duty Pulley ClutchExtreme Duty
Pulley Clutch

Information on the Hilliard Extreme Duty pulley clutch can now be found on our main corporate site [here].

Extreme Duty Centrifugal Clutches

The Extreme Duty family of centrifugal clutches are designed to hold up to the rider's toughest demands, from the veteran racers to the beginners in a yard kart. These clutches are engineered to take the heat and keep on going. The quick-change spring design makes it easy to adjust engagement speeds without a lot of time or hassle. They are available in three different series; The Extreme Duty for fun karts, The Inferno Kart Racing series, and the Inferno Snowmobile Racing series. Each series is specifically designed for peak performance in their sport.


Affordably priced, longer lasting and superior design.

Inferno Kart Testimonial:
"I personally use these clutches, they are easy to install, and changing the springs and weights is very easy and convenient..."
Rick Moses
Moes Karting World
Inferno Snow Testimonial:
"We have tested many brands of racing clutches and believe the Flurry and Blizzard are the first true Snowmobile racing clutches..."
Scott Minzenmeyer
Recreational Motorsports