The StopTech Sport Slotted Brake Rotor (Cryo-Treated) 126.44129CSL is a premium performance upgrade for the front left position. This rotor undergoes a proprietary deep-freeze cryogenic treatment to permanently improve the grain structure of the metal, resulting in enhanced durability and resistance to thermal cracking. The specialized slotting helps evacuate brake dust, gases, and heat, ensuring a consistent friction surface and improved wet weather response. Finished with a black e-coating for superior corrosion protection. This component is part of the StopTech performance series. Included in this SKU: 1 x Performance Slotted Cryo-Treated Rotor (Part No. 126.44129CSL). Suggested pairing with right-side rotor 126.44128CSR.