StopTech Sport Slotted Brake Rotors are one-piece direct replacement brake discs for factory brake systems and stock calipers. The 126.45078SR is a Right Front premium performance rotor featuring a unique vacuum-cast high-carbon metallurgy and a directional slotted surface. The slotting helps to wipe away debris, gases, and heat, improving brake response and consistency. This part is a single rotor (1 unit). Key Features: Increased initial bite, improved wet weather performance, black e-coat finish for corrosion resistance. For a complete front axle set, it is recommended to pair this with the left side rotor (126.45078SL).