StopTech Sport Rotors (Slotted & Drilled) are 1-piece direct replacement brake discs for your factory brake system and stock calipers. These rotors provide improved cooling and better bite compared to plain rotors. The 'R' suffix indicates this is the Rear Right side rotor. Features include a Black E-Coat finish for superior corrosion resistance and high-carbon metallurgy for quieter operation and better crack resistance. This item is a single rotor (1 unit). Part number for matching Left side: 127.34159L.