The drilled holes will reduce the heat that builds on the rotor.
Drilled and slotted rotors will grab more bite to the brake pads giving you shorter stopping distance especially in wet weather. Rotors-Drilled and Slotted-SilverZinc Coated, 7002-54048 DFC Premium Performance Brake Rotors are engineered for performance at a great value. The slots on the rotor removes brake and road debris and prevent pad glazing.