8 Piston 421mm x 36mm Slotted Two-Piece Floating Rotor Big Brake Kit

This bolt-on system builds upon the Procomp kit with larger calipers, rotors, and brake pads, along with an increased number of pistons. The calipers themselves are crafted from a single billet of aircraft-grade aluminum, ensuring a lightweight yet exceptionally strong and corrosion-resistant component. They also feature aluminum pistons that offer superior heat management. Key specifications include 421mm x 36mm slotted, two-piece floating rotors and 8-piston calipers finished in orange. The kit includes SC1 Street Pads and stainless steel brake lines, designed to prevent expansion under pressure. This kit is specifically designed as a direct fit for the 2009-2016 BMW E89 Z4. The two-piece floating rotor design helps reduce both rotating and unsprung weight, while also mitigating thermal stresses that can lead to warping or cupping. The unique slot design on the rotors aids in expelling gas and pad debris, and the rotors are heat-treated and balanced for optimal performance. Slotted rotors are recommended for vehicles primarily used for track driving.