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The R1 Concepts Geo-Carbon rotor for the rear left of 2006–2021 BMW 428i is listed for that rear-left position; while this variant omits drilled-and-slotted wording, the Geo-Carbon identity signals the rotor style in the product title. The part is presented specifically for the stated 428i rear-left fitment to restore the rotor surface for that application.
R1 06-21 BMW 428I Rear Left Geo-Carbon Rotor
