The Acerbis X-Brake Vented Front Disc Cover with Mounting Kit comes with the vehicle specific mount kit and disc cover in the color of your choice. The X-Brake Vented Front Disc Cover provides unparalleled protection, strength, and good looks. Provides ample venting to keep the brake cool in all conditions. -Acerbis X-Brake Vented Front Disc Cover description. -Machined aluminum flange. -Can remove wheel without removing disc cover. -Fits up to 290mm discs. -Will only work with stock hubs.