StopTech Drilled Sport Rotors are 1-piece direct replacement brake discs for your factory brake system and stock calipers. These 'Sport Rotors' provide improved stopping power and cooling compared to original rotors. The cross-drilled holes allow for better heat dissipation and help sweep away debris between the pad and rotor surface. Features a durable black e-coating on the hubs and vanes for superior corrosion resistance. This is a single LEFT REAR rotor. For a complete rear axle set, please order the corresponding right side (128.33113R). Specifications: Diameter 310mm, Thickness 22mm, Vented, 5-Lug. This part consists of: 1x StopTech 128.33113L Brake Rotor.