StopTech Sport Drilled & Slotted Brake Rotors are 1-piece direct replacement brake discs for factory brake systems and stock calipers. They offer improved cooling as well as other advantages the competition doesn't offer. StopTech Sport Rotors feature a unique cross-drilling and slotting aid with heat and brake dust dispersal, preventing glazing of the pads, adding bite and improving wet and dry braking performance. This part number refers to a single Rear Left side rotor. Components: 1 x StopTech Sport Rotor (Part No. 127.42079L). Key features: Premium e-coating finish to withstand corrosion, High-quality metallurgy for quieter braking, and increased initial bite.