tested and proven by N. Taniguchi (NOB), Japan Super GT Driver, M7 Brake Rotor stand the most extreme driving conditions and resist high heat contributes from vigorous braking force. This is achieved through carbon mixed technology material and special heat treatment process. This process also increases hardness and greatly reduced heat crack during hard driving. As a result M7 Brake Rotor can now safely be used for a long term for both circuit and street driving.