StopTech Sport Rotors are 1-piece direct replacement brake discs for your factory brake system and stock calipers. They offer improved cooling as well as other advantages the competition doesn't offer. StopTech Sport Rotors feature a unique cross-drilling that optimizes airflow and heat dissipation, helping to increase initial bite and provide consistent performance even in wet conditions. The durable black e-coating on the non-friction surfaces provides long-lasting corrosion resistance. This is a single LEFT Front rotor. Part number: 128.47021L. Specifications: Rotor Style: Drilled; Position: Front Left; Diameter: 276mm; Bolt Pattern: 5x114.3.