StopTech Sport Rotors are 1-piece direct replacement brake discs for factory brake systems and stock calipers. The 127.40026L is a Left Front Slotted and Drilled rotor that offers improved cooling and better bite compared to blank rotors. This part is finished with a black e-coating for superior corrosion resistance. This is a single rotor (1 unit). For a full front axle upgrade, it is recommended to purchase the matching right-side rotor (PN: 127.40026R). Related Articulus: 127.40026L (Left Rotor), 127.40026R (Right Rotor).