Raybestos 580876R Professional Grade Disc Brake Rotor - Drum in Hat Raybestos 580876R Brake Rotor - Drum in Hat Application: ChevTrk:Silverado 2500HD(2011-2013),Silverado 3500HD(2011-2013);GMC Trk.:Sierra 2500HD(2011-2013),Sierra 3500HD(2011-2013) Packaged 1 per Box.