This SHW 06-08 BMW Z4 3.2L Right Rear Cross-Drilled Lightweight Brake Rotor (34212282304) is a direct fit replacement for the original rear rotor on 2006-2008 BMW Z4 3.2L models. It is a lightweight brake rotor that has been cross-drilled to provide superior cooling and improved braking performance. It is made of high-grade cast iron and is coated with a special anti-rust coating to ensure long-lasting durability. This rotor is an ideal upgrade for those looking for improved braking performance and responsiveness.