The GiroDisc 14-20 BMW M2/M3/M4 (F8X w/Blue Calipers) 380mm Slotted Rear Rotors are high-performance brake rotors designed to provide superior braking power and control. The rotors feature a 14-20 inch diameter slotted design and are compatible with BMW M2, M3, and M4 F8X models with blue calipers. The rotors are made from a lightweight, high-grade aluminum alloy for maximum strength and durability and feature a unique vented design for improved cooling and heat dissipation. The slotted design helps to reduce brake dust buildup and improve brake pad bite. This product is ideal for those looking for improved brake performance and control.