Power Stop K1124 Front 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. Rotor height is 2.24 inch. Hub hole diameter is 2.28 inch. Minimum rotor thickness is 0.87 inch. Nominal rotor thickness is 0.94 inch. Outside diameter is 10.9 inch. Stud size is 0.5 inch