The DFC Geomet-coated hi-carbon alloy rear rotor for 2017–2025 Audi S8 applications is a direct-fit replacement intended to restore braking reliability. Constructed with G3000/G11H18 cast iron and an OE vane configuration to manage heat, the rotor is precision mill-balanced and fine-turned (16 RMS) to reduce vibration and assist pad bedding. A Geomet coating protects against corrosion while DTV (0.010 mm) and 0.050 mm runout limits keep stopping predictable.
DFC 17-25 Audi S8 Rear Hi-Carbon Alloy Geomet Coated Rotor