StopTech Sport Slotted Brake Rotors are one-piece direct replacement brake discs for your factory brake system and stock calipers. These rotors feature a unique vacuum cast high carbon metallurgy and are finished with a durable black e-coating on the non-friction surfaces to prevent corrosion. The directional slotting aids in heat and brake dust dispersal, preventing glazing and improving bite. Part number 126.40101SR is a single Rear Right (Passenger Side) rotor. For a complete rear axle set, it is recommended to pair this with 126.40101SL (Rear Left).