StopTech Slotted Sport Brake Rotors are premium 1-piece direct replacement brake discs designed for high-performance street driving. This specific part (126.42105SL) is a Left Rear Slotted Rotor that provides improved cooling and shorter stopping distances. The Vac-U-Slots help evacuate gases, dust, and debris, ensuring consistent pad contact and preventing brake fade. Features a black e-coating for superior corrosion resistance on non-friction surfaces. Sold individually. If you require a pair, please order the corresponding Right Rear Rotor (126.42105SR). Specifications: Diameter 350mm, Vented Type, 5-Lug Bolt Pattern.