SP Performance Diamond Slotted Brake Rotors perform like the slotted rotors, with the added bonus of the dimples.The slots on the brake rotor surface are used to expel the brake dust away from your braking surface and wheels, keeping the braking surface cooler. The Dimples, or Diamonds, on the surface of the rotor keep the braking surface cool, without the risk of forming stress cracks like thecross drilledrotors.All SP Performance Brake rotors are machine balanced and disc ground and meet OEM specification.The Diamond Slotted Brake rotors are direct replacements to your existing brake rotors and require no brake system modifications.All Slotted brake rotors come with your choice of coating for rust prevention.They are available in Silver Zinc Plating, Black Zinc Plating and Gray Zinc Coating.All Rotors are machined and plated to order by SP Performance employees.