GeoSpec™ Plain 1-Piece Rear Brake Rotor (RRE-40093) by R1 Concepts®. Quantity: 1 Per Pack. Superior corrosion protection and enhanced noise dampening, the R1 Carbon GEOMET® Series is built to last. Replacement rotors are not drilled or slotted, but offer equal quality as your OEM rotors but at an affordable price. Brake Rotor Coating is designed to disappear in the area that the brake pads contact the rotor.