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The R1 Concepts Geo-Carbon drilled-and-slotted rotor for 2016–2020 Buick Regal Sportback (rear left) names the listed rear-left rotor and its application. Presented in R1's RNC Geo-Carbon roster, the description specifies a drilled & slotted rear-left unit for Regal Sportback models within the years shown. This overview helps confirm the correct rear-left rotor configuration when ordering replacement parts for those Buick models.
R1 16-20 Buick Regal Sportback Rear Left Drilled & Slotted Geo-Carbon Rotor
