ST65/28-28-32/35

The Stoptech 309x32mm Replacement Brake Rotor is a performance rotor ring for track and race applications. It features directional ventilation vanes for up to 30% enhanced cooling efficiency compared to OE rotors, and is made from CM-250 special formulated high carbon alloy cast iron for optimal bite, thermal characteristics, high-temperature strength, and durability. Heat-treated to reduce stress, prevent deformation and vibration. State-of-the-art CBN surface machining ensures better break-in. Its floating 2-piece design allows thermal expansion, minimizing deformation and ensuring the rotor is self-centered. Slotted surfaces improve braking consistency by maintaining a clean contact surface and dissipating heat and gases. Lighter than most OE rotors, improving handling by reducing unsprung mass. Specifically replacements for StopTech C43 CBK brake kits and recommended for Mercedes-Benz and AMG drivers seeking OEM-like refinement with superior heat control.