The R1 Concepts drilled-and-slotted black brake rotor for 1966–1992 Bertone X1/9 is specified for right-side applications identified in the source and offers a drilled-and-slotted braking surface with a black finish. By summarizing the explicit X1/9 year range and orientation, the overview provides shopper-facing fitment language for those replacing the right-side rotor on that model.
R1 66-92 Bertone X-1/9 Rear Right Front Right Drilled & Slotted Black Brake Rotor