StopTech Sport Rotors (formerly Power Slot) are direct replacement 1-piece brake rotors for factory brake systems and stock calipers. They improve brake performance and cooling, offering better bite and reduced glaze. This is the SportStop Slotted series, specifically designed for the Left Rear position. The slotted pattern helps evacuate gases and dust, ensuring consistent braking under various conditions. This item is a single rotor: Part Number 126.34066SL (1 x Slotted Brake Rotor, Rear Left).