The Carbotech 1521 in a high-performance street compound. Known for its release and modulation with unmatched rotor friendliness. The 1521 is a very low dusting and low noise compound that provides excellent initial bite. Excellent linear torque production provides incredible braking force without ABS intervention. The operating range starts out at ambient and goes up to 800ï¿½F (426ï¿½C). 1521 is suitable for ALL street cars, perfect for your tow or fleet vehicle. Carbotech 1521 is NOT recommended for any track use.