This SHW 15-18 BMW X5 M 4.4L Left Rear Cross-Drilled Lightweight Brake Rotor (34212284903) is designed for high performance and durability. It is made from lightweight aluminum alloy and features cross-drilled holes to allow for better heat dissipation and improved braking performance. The rotor has been tested in extreme conditions to ensure it can handle the most demanding driving conditions. It is a direct replacement for the original brake rotor and is an ideal upgrade for those looking to improve the performance of their BMW X5 M.