4 Pad Clutch Disc. Only for racing and/or off road applications when intentional slippage would normally burn up an organic lining. Carries more torque than organic. KEP 4 Pad is specially lightened to reduce the effect of inertia while shifting. Not recommended for street because of harsh engagement.
6 Pad Clutch disc. More surface area to dissipate heat better. Also allows smoother engagement.