EBC Sport Slotted Front Rotor Kit | 2003-2005 SRT-4 (USR7112)The EBC "GD" series is signified by a "three spot" drilling pattern and a wide aperture full width slot. The full width slot expels dirt, rust, dust, grit, water and any other contaminants that may get between the pad and the disc surface. One important feature is to note that our wide aperture slots also can contain significant volumes of surface gases which are created during heavy braking and prevent the pad from "aquaplaning" on these gases,