The DFC Geomet-coated right rear drilled rotor for 2021–2025 BMW M4 is a hi-carbon alloy direct-fit replacement intended to restore rear braking performance while offering drilled cooling. Built using G3000/G11H18 iron castings with OE vane geometry for heat management, this rotor is precision mill-balanced for smooth stopping, fine-turned to 16 RMS to improve break-in, and Geomet-coated for corrosion resistance. DTV ≤0.10 mm; lateral runout ≤0.50 mm.

DFC 21-25 BMW M4 Right Rear Drilled Hi-Carbon Alloy GEOMET Coated Rotor