StopTech Sport Rotors (Drilled & Slotted) are 1-piece direct replacement brake discs for your factory brake system and stock calipers. They offer improved stopping power and cooling compared to standard rotors. This specific part (127.33134L) is the Front Left (Driver Side) rotor. Features include: - Cross-drilling and slotting for better heat dissipation and gas venting - E-Coating finish to protect against corrosion - High-carbon metallurgy for reduced noise and cracking resistance. Note: This is a single rotor (Front Left). For a complete axle set, it must be paired with part number 127.33134R (Front Right).