The EradiSpeed+ is a direct replacement 2pc rotor for the 2007-2012 Mustang GT500. This is designed to work with the factory Brembo brake system. These 14 inch rotors feature directional vanes, which advances cooling efforts, and are a 2pc design with an anodized black 6061-T6 aluminum center hat bolted to the rotor ring, which greatly reduces weight.Rotor Diameter:14 inch 2-piecePiston Count:Uses your existing stock calipers.Pad Type:Uses stock pads.Includes:14 inch 2pc rotor assemblies for front rotors upgrade (sold in pairs)Notes:Designed to be used on the 2007-2012 factory Brembo Mustangs brake systems.Will Not fit 2013 Mustang