StopTech Sport Rotors are 1-piece direct replacement brake discs for factory brake systems and stock calipers. This Front Left 127.63063L rotor features both cross-drilling and slotting to improve cooling, reduce fade, and sweep away debris for consistent stopping power. The premium E-Coating finish provides superior corrosion resistance. This is a single front left rotor. Matching front right rotor: 127.63063R.