Rubber Insulator for Propshaft Bearing - Mitsubishi Lancer EVO IV CN9A These are a steel washer with a rubber surround, the rubber can perish and allow movement of the propshaft bearing. This can cause shaking/vibration and a wump wump wump sound. On EVO 4 Eight of these are used, Four on each propshaft bearing. See HERE Price is for ONE. Mitsubishi Part Number MB837586
