StopTech Sport Slotted and Drilled Brake Rotors are 1-piece direct replacement brake discs for your factory brake system and stock calipers. They offer improved cooling as well as other advantages the championship-winning StopTech Big Brake Kits offer. The unique cross-drilling and slotting aids with heat and brake dust dispersal; prevents glazing of the pads; adds bite and improves wet and dry braking performance. Included part: 127.40086L (1 Front Left Brake Rotor).