Polini High Performance friction plates made of aluminum for the Polini clutch 230.0501. Aluminum provides better heat conduction and prevents premature glazing of the pads. In addition, the moving mass of the clutch is reduced due to the lighter material, leader to improved response. The friction pads are made of special cork material, which has always been the best material for clutch linings. Unfortunately, it rarely is used today. Polini recommends that the cork disks are doused in oil overnight before installation. This improves the running-in of the new pads. The oil should be the same as in the engine or transmission.