FULL TRACK RACE: ET900 - High torque and high deceleration rate. They are dedicated track race pad for serious racers with ultimate braking performance at the trade off of dusting, squeaking, wear rate on pads and rotors. They are NOT to be used for street driving otherwise you may experience adverse effect such as rotor glazing, and/or excessive wear (scoring) on rotors. Proper break-in and minimum operating temperature (300°F+) are required to achieve optimal performance.