Every SportStop brake rotor is produced from a high quality Centric Parts blank casting and finished in a durable e-coating for corrosion resistance. These rotors improve the initial bite of the brake pads, and help wipe away the debris that forms between the pad and the disc. Rotors are finished with black e-coating on both sides of the hat, inside the cooling vanes, and on the outside edge. Power Alloy Metallurgy is exclusive feature of Power Slot and SportStop rotors. In specific vehicle applications, StopTech works with foundry partners to increase the molybdenum or carbon content of the castings, and to carefully control the cooling rate during production to reach targets for hardness and tensile strength. Nearly all SportStop cross-drilled and slotted rotors have unique drilled hole patterns for the left and right sides of the vehicle. For these directional patterns, straight vane or pillar vane rotors are used to ensure that a drilled hole never touches a cooling vane.