The Genuine BMW M Performance Big Brake Kit (part number 34112450468) is a high-performance brake upgrade for BMW vehicles. This kit includes larger brake calipers, rotors, and pads that are specifically designed to improve braking performance and reduce stopping distance. The calipers are made from lightweight aluminum and feature the iconic M Performance logo. The rotors are cross-drilled and slotted for improved heat dissipation and better grip. The pads are also upgraded to provide better braking response and durability. This kit is a direct fit for select BMW models and is an ideal choice for drivers looking to enhance the performance of their vehicle.