Power Stop K621 Rear Z23 Evolution Brake Kit with Drilled/Slotted Rotors and Ceramic Brake Pads Custom-matched components are engineered to work together for superior braking power on your daily-driver Z23 Carbon-Fiber ceramic formula ensures dust-free braking performance. Premium rubberized shims provide virtually noise-free braking. Drilled & Slotted performance rotors for maximum cooling. Includes premium stainless steel hardware kit and ceramic brake lubricant for easy installation.