NAPA Adaptive One High Carbon Brake Rotors provide the best performance for today's driving conditions. Born from racing technology, high carbon rotors come standard on many luxury and high performance cars. The higher quality brake rotor provides better perfomance and safety for all vehicules under all driving conditions. NAPA Adaptive One rotors contain a higher carbon content than regular standard rotors which in return helps thermal stability. There are many well documented advantages to usuing High Carbon Content as opposed to regular carbon content.