Street Series X Gold provides all the benefits of Street Series, with a premium non-directional cross drilled and slotted design, plus an attractive gold finish on the rotor hub. The introduction of our unique cross drilled and slotted design increases the number of exit points, allowing more brake pad friction dust and gases to escape through both the cross drilled holes and slots, resulting in better braking performance. While providing a similar performance benefit to the T2 slot, the X Gold is a popular alternative for show cars. X Gold is denoted by the suffix (X) in Street Series part numbers.