Procomp 4-Piston Rear Big Brake Kit

The Ksport Procomp Big Brake Kit offers enhanced stopping power for your vehicle, specifically designed for the 2011-2016 MINI Cooper Countryman R60 Chassis 2WD models. This rear brake system integrates advanced technology to significantly reduce brake fade and continuously refresh the brake pad surface during braking, ensuring consistent performance. The kit features a lightweight ProComp 4-piston caliper, machined from aircraft-quality billet and weighing just over 5lbs. The caliper boasts a differential bore configuration, aluminum pistons, high-temperature seals, and stainless steel brake pad wear plates for durability and performance. Its opposed piston design increases caliper rigidity and improves pad wear compared to OEM systems. Complementing the calipers are stainless steel brake lines that eliminate expansion under pressure, ensuring a firm pedal feel. Included are 330mm (13-inch) 2-piece floating disc assemblies, which help reduce both rotating and unsprung weight. These floating discs also mitigate thermal stresses, preventing warping and cupping of the braking surface under extreme heat. The rotors feature a unique slot design that reduces braking noise and efficiently expels gas and pad debris. This specific kit utilizes cross-drilled rotors, which tend to run cooler and are recommended for daily driven vehicles seeking improved braking performance and heat management.