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The DFC Geomet-coated dimpled & slotted rotor for BMW 230i (2013–2021), rear, is a hi-carbon alloy rotor combining dimpling and slots with a Geomet corrosion-resistant finish. Constructed from premium G3000/G11H18 iron castings and an OE vane configuration, it promotes heat dissipation. Precision mill-balanced and fine-turned to a 16 RMS surface for pad break-in, it meets tight DTV and lateral runout tolerances to reduce vibration.
DFC 13-21 BMW 230i Rear Dimpled & Slotted Hi-Carbon Alloy Geomet Coated Rotor
