Made from 420 High-carbon stainless Tier-1 steel. Laser cut, never stamped. Each rotor is individually heat-treated and double-disc parallel ground to assure perfect flatness. Wave design allows for lower operating temperatures at extreme conditions. Wave design is much lighter than a stock rotor. For maximum braking performance and rotor longevity, Galfer recommends using Galfer brake pads with Galfer rotors..