The EBC 09+ BMW Z4 3.0 (E89) USR Slotted Rear Rotors are designed for superior braking performance. They feature a unique angled slot design to reduce brake fade and improve performance. The slots also help to reduce brake dust and debris build up for a cleaner look. The rotors are made from high-grade cast iron for superior strength and durability. They are also coated with a corrosion-resistant finish to prevent rust and corrosion. These rotors are a direct replacement for the stock rotors and are easy to install.