Replaces the stock plastic transmission pulley cover and pulley guard. The optional pulley guard is advised for both safety and to add better looks since the overall impression of the bike is determined by the details. The X-Spider guard comes with 3-point mount; the 4th arm serves as a belt guard / catch. Installation hardware included. Manufactured from black anodized CNC precision machined billet aluminum. Note: used with 911369 X-Spider pulley guard (must be ordered separately). Note: Comes with approval. Check your local MCS dealer or the MCS sales department for exact type of approval and validity on bike model and years on the test report.