StopTech Sport Slotted Cryo brake rotors are one-piece direct replacement brake discs for your factory brake system and stock calipers. These rotors undergo a deep cryogenic treatment that relieves internal stresses in the brake rotor material and modifies the micro-structure of the grain for increased durability and service life. The slotted pattern provides improved heat dissipation and helps clear debris for consistent braking performance. This part (126.34057CSL) is for the Rear Left position. Features unique E-Coat finish for corrosion resistance. Note: This item is a single rotor. For a complete rear axle set, please also order the corresponding Rear Right rotor (126.34057CSR).