The EBC 03-06 BMW Z4 3.0 BSD Rear Rotors are a set of high-performance brake rotors designed specifically for the 2003-2006 BMW Z4 3.0. These rotors feature a BSD (Black Slotted Disc) design, which helps to dissipate heat and reduce brake fade. The slotted design also helps to improve brake pad bite and reduce brake dust. The rotors are made from a high-grade cast iron for superior strength and durability, and are designed to meet or exceed OEM specifications for fit and performance.