StopTech Sport Rotors (Slotted and Drilled) are 1-piece direct replacement brake discs for your factory brake system and stock calipers. Features: High-performance street use; Cross-drilled and slotted for improved cooling and bite; Corrosion-resistant E-Coating finish. This part (127.42088L) is a Rear Left Single Rotor. For a complete rear axle set, it is recommended to pair with: 127.42088R (Rear Right Rotor).