StopTech Slotted Sport Brake Rotor (Left Front). Designed to improve braking performance by wiping away debris and gases, providing consistent friction and better cooling. High-quality metallurgy resists cracking and warping. This is a single component: 1x StopTech 126.44125SL Left Front Disc Brake Rotor. Recommended to be installed with matching right-side rotor (126.44125SR) for balanced performance.