Magnum Original Cross Drilled rotors and Magnum Ultra Cross-Drilled rotors are direct replacements for factory rotors thus no modification is required to install them onto your vehicle. These special rotors channel brake dust, gas and water more efficiently through drilled holes to ensure perfect contact between brake pads and rotors. Drilled rotors have the additional advantage of being lighter and running roughly 200 degrees cooler. The result is shorter braking distance, better pedal feel and significantly reduces brake fade.