Tsunami® rotors are the evolution of Galfer's well-known technology. The blade design is completely slotted from the top to bottom, both diagonally and opposed, for much greater trailing and leading edge performance. For the demanding racer who needs outstanding performance even in the most aggressive conditions! Every high-quality, Galfer-patented rotor is made from a proprietary mix of virgin high-carbon 420 stainless steel, laser cut (never stamped), double disc-parallel ground to assure perfect parallel flatness and heat treated to each specific application. Includes: Oversized or O.E.M. standard, floating, patented rotor for optimum pad-to-rotor contact, special grooves to provide an active cooling system by allowing air to pass over every point of brake pad surface. Full instructions provided along with any technical help needed!