OT-Series Carbon clutches offer the best in clutch technology. In 1989, Tilton patented the first carbon racing clutch. It was also the first carbon clutch to be used, and first to win, in Formula One (F1). Today, every car competing in Formula One utilizes this clutch technology. The experience Tilton has gained since 1989 has been applied to produce the very best carbon clutches available. The ultimate in clutch technology, Tilton Carbon clutches offer a unique combination of low rotating mass, high torque capacity, extremely high heat capacity, smooth engagement and durability. In addition, the fact that the carbon plates do not warp from heat, the release of the clutch is very consistent and clutch failure from overheating is minimized. Suitable for use in most racing and high-performance applications.