High friction clutch plate set incl. friction plates, clutch steel discs and clutch springs. Usually, only 4 friction plates and 3 steel discs are used in a standard clutch. This High Friction Kit comes with slightly thinner friction plates and steel discs, so that an additional friction plate and steel disc can be added: The friction surface is increased by approx. 20%. And there is less slippage and better coefficients of friction.