High-performance StopTech Sport Slotted Brake Rotors are a direct replacement for your factory braking system. The 126.42100SL is a front left side specialized rotor designed for vehicles equipped with factory Akebono Sport brakes (355mm diameter). Key features include: 1. Power Slotting: Helps clear debris, gases, and heat for consistent stopping power. 2. E-Coating: Black finish on hubs and vanes for superior corrosion resistance. 3. Enhanced Cooling: Directional vane design for improved heat dissipation. This item (126.42100SL) is a single front left rotor. If you require a complete front axle set, you must purchase the matching right side rotor: 126.42100SR.