All Magnum Original Cross-Drilled Rotors and Magnum Ultra Cross-Drilled Rotors are made to fit original factory calipers. All our cross-drilled brake rotors including both Magnum Original and Magnum Ultra lineup match the vehicles original equipment rotors dimensions and are fully compatible with its hubs, brake calipers and road wheels of the vehicle, and employ one-piece vented or solid rotors depending on the vehicles original equipment specifications. Each rotor is precisely machined by CNC machines. The drill pattern is designed to give optimum cooling but not to sacrifice durability, nor do they significantly reduce swept area. Lots of holes may "look" great, but every hole takes away a small amount of braking surface (swept area). Too many holes create a meaningful loss of swept area and ultimate braking power, not to mention a loss of overall strength. Starting with select castings, Magnum drilled brake rotors undergo the race-born practice of cross drilling to provide multiple paths to disperse built-up heat and gasses. The Magnum rotorscross-drilled holes are bi-angle chamfered at the rotors outer surfaces to help reduce the cracking caused by repeated, high stress, high temperature brake applications. Magnum Original and Ultra cross-drilled brake rotors are sold in axle pairs and they are available to most older to newer vehicles. Please contact your local dealer for details.

Magnum Cross-Drilled Brake Rotors

Magnum Cross-Drilled Brake Rotors are for drivers who want to improve the look and performance of their vehicles original braking system at a reasonable price. Magnum cross-drilled brake rotors provide excellent stopping power in everyday traffic, as well as more spirited, high performance street and highway driving. Most Magnum Cross-Drilled Rotors are directional and when in motion, the vents draw air from the center of the rotor outward. This airflow, over an increased internal surface area, very effectively dissipates heat. Cross drilling adds to this airflow, as well as providing additional surface cooling. It also helps the rotor to cool more evenly, eliminating hot spots and greatly reducing brake pulsation. All Magnum Cross-Drilled Rotors are made of high carbon iron to ensure longer life and quiet operation.

Magnum ULTRA Cross-Drilled Brake Rotors

Magnum ULTRA Cross-Drilled brake rotors feature all the advantages of Magnum Cross-Drilled Rotors plus the followings:
- Cryogenic treated. This process permanently and dramatically improves the performance and useful life our Magnum Ultra Cross-Drilled brake rotors. Using a proprietary computer-controlled process, the rotor is cooled slowly to deep cryogenic temperatures (-300F), and slowly returned to room temperature, then heat-tempered as the final step. Computer technology allows us to regulate temperatures to 1 degree, accurately manipulating our Cryo treatment in accordance with the mass of your parts. Although not apparent to the naked eye, the improvements to the metal are significant. Deep cryogenic processing creates dramatic increases in abrasive wear resistance and durability. The increases in tensile strength, toughness and stability couple with the release of internal residual stresses.
- Nickel Cadmium coated. This process is for corrosion resistance to help eliminate rust and to offer a bold, aggressive appearance to enhance the look of your vehicle.
- Longer service life. The Magnum Ultra Cross-Drilled Brake Rotors normally last 15% longer than most OEM rotors due to the fact that the Cryogenic treated metal used in these rotors are more resistance to wear and tear, as well as rotor warp which causes most premature rotors replacement.

IMPORTANT REMINDER: Drilled rotors offered as OEM replacements should not be considered appropriate for high-speed track use.
While cross-drilled rotors offer an enhanced appearance and add some resistance to the boundary layer of gasses that can build up between the pad and rotor, they are not designed to withstand the extreme temperatures and stress that are produced on the racetrack. If they are used on the track, it is very important that the rotors be carefully inspected and should not be driven on if even minor signs of deterioration are seen. Please note that if any products are used on the track they are not warrantable.