4000 SERIES XS Gold provides all the benefits of 4000 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 T3 slot, the XS Gold is a popular alternative for show cars. Drilled rotor configurations are not recommended for heavy off-road or track day usage.