The R1 Concepts Geo-Carbon drilled-and-slotted rotor for the rear right of 2003–2008 BMW Z4 applications is a replacement rotor equipped with drilled holes and machined slots to aid pad contact and help evacuate heat and debris from the braking surface. It’s specified for the Z4 rear right position and intended for use when refreshing rear braking components on those model years.
R1 03-08 BMW Z4 Rear Right Drilled & Slotted Geo-Carbon Rotor