MUGEN MBX5 AND MBX5-T "XTREME BLUE" BRAKE DISKS (2) THESE BRAKE DISK REPLACE THE STOCK STEEL DISK AND PROVIDE CONSTANT BRAKING OVER OTHER FIBER BRAKES. *** INCLUDED WITH ITEM *** 2 - CARBON FIBER BRAKE DISK *** NOTE *** REMOVE THE BRAKE PADS FROM THE CALIPERS BEFORE USING THESE DISKS.