StopTech Sport Drilled Brake Rotors are 1-piece direct replacement brake discs for your factory brake system and stock calipers. They offer improved stopping performance and cooling through a unique cross-drilled pattern that helps sweep away debris and gases. This part number (128.40101R) is specifically designed for the Rear Right (Passenger Side) position. Key features include a durable black e-coat finish for corrosion protection and high-carbon metallurgy for reduced noise and increased crack resistance. This is a single rotor (1 unit). For a complete rear axle set, it is recommended to pair this with the Left side rotor (128.40101L).