From HB Racing:
A Piece of Art Developed by Torrance Deguzman to make your engine able to give all the power on the track. The 3 keys of this project are :
Solid – Easy to Maintain – Performance
The Clutch sets comes with everything inside but spare parts are available as well as tuning springs in different hardness to adapt the power delivery to your driving style or to the track conditions.
Also the new 13 teeth clutch will make sure it stay cool and stable during long final runs. It is compatible with all the HB Racing clutch bell you might have.
To make everything easy for the racers and mechanics, Torrance prepared the Ultimate Clutch Mounting Tool.
Insert on the shaft and turn anti-clockwise.
Click, your spring is in.