The R1 Concepts Geo-Carbon drilled-and-slotted rotor for the rear left of 2009–2016 BMW Z4 is sized for the specified rear-left position. The drilled and slotted rotor face and Geo-Carbon design help with heat management and debris removal to keep pad contact consistent under braking. This copy reflects the explicit rear-left Z4 application included in the source.
R1 09-16 BMW Z4 Rear Left Drilled & Slotted Geo-Carbon Rotor