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 ensure 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 longevity, Galfer recommends using Galfer brake pads with Galfer rotors.. ROTOR FR SEM FLT WAVE