Bluestuff NDX is a high friction sport and race material that can be used for aggressive street driving and intermediate track use. The biggest advantage of EBC Bluestuff Bluestuff NDX is their bite from cold and progressive brake feel and the ability to bring a car to a complete stop. Deep V grooves help venting and catch dirt, dust and debris. Notice the open granular surface texture after the heat scorch (pre-bedding) process.