GCX Plain Solid 1-Piece Rear Brake Rotor (320.61113F) by Centric®. Quantity: 1 Per Pack. GCX™ Elemental Protection Disc Brake Rotors by Centric are specially engineered to restore OE performance and provide superior protection from rust and corrosion, even in extreme conditions. They feature Centric’s advanced RS200 Brake Rotor Coating.