Rear Big Brake Kit

The Ksport BKMT350-443CO Procomp Big Brake Kit is a rear-axle upgrade designed to significantly enhance stopping power and combat brake fade during demanding driving conditions. This kit features a floating two-piece disc assembly, which not only reduces unsprung and rotating weight but also allows for thermal expansion to dissipate extreme heat, preventing rotor warping and surface cupping. The caliper design offers a choice of 4, 6, or 8 piston configurations, each featuring a lightweight, one-piece construction with a differential bore opposed piston setup. This promotes even pad wear and increases caliper rigidity compared to OEM components. Machined from aircraft-quality billet aluminum, these calipers weigh just over 5 lbs each and come standard with aluminum pistons, high-temperature seals, and stainless-steel brake pad wear plates. The rotors in this kit are either cross-drilled, recommended for daily-driven vehicles for cooler operation, or slotted, recommended for frequent track use to expel gas and debris more effectively. Every rotor is heat-treated and balanced for consistent performance. The kit also includes stainless-steel braided brake lines, which resist expansion under pressure, contributing to a firm and consistent pedal feel. This big brake kit is a complete, track-proven upgrade that enhances braking confidence for both street performance enthusiasts and serious motorsport competitors. The ceramic friction material and aluminum caliper construction contribute to its performance capabilities. The kit is specifically for rear applications and includes all necessary mounting brackets.