StopTech Sport Slotted Brake Rotors are 1-piece direct replacement brake discs for your factory brake system. This part number (126.45078SL) refers specifically to the Left Front (Driver Side) Rotor. Features include: directional Robinson slots to sweep away debris and gases, improved wet weather braking, and a black e-coat finish on the hats and vanes for superior corrosion resistance. This is a single rotor; for a complete front axle set, it is recommended to pair with the Right Front Rotor (PN: 126.45078SR). Technical specifications: Diameter: 320mm, Height: 48.5mm, Thickness: 25mm, Bolt Pattern: 5x114.3.