The EBC 09+ BMW Z4 3.0 (E89) Premium Front Rotors are a high-performance brake rotor designed to provide superior stopping power and superior longevity. The rotors are made from a proprietary iron alloy that is designed to resist warping and cracking under heavy braking and high temperatures. They feature a special slotted and drilled design to improve cooling and reduce brake fade. The rotors are also coated with a special zinc-based finish that helps to protect against corrosion and rust. These rotors provide excellent stopping power and are perfect for street and track use.