The lightweight 3-pieces pulley is made from 6061-T6 forged aluminum materials with high-rigidity anodized surface. It¡¦s lighter than OEM pulley and it provides excellent strength and rigidity. The diameter of the pulley was slightly increased however; it won¡¦t affect much to the water pump or the generator. Though, it can effectively reduce the stress of other parts around the engine while it¡¦s running.