For a detailed third party review of RacingBrake rotors and pads, please check this link on NAGTROC:
RB ET-Series Performance Street Compounds
The ET Series compounds provide excellent modulation, consistent friction and torque output, and can be run from ambient temperature, even during cold winter mornings.
ET300: Performance Street - Delivers braking performance beyond stock pads, yet with minimal dust and no squeaking.
ET500: Aggressive Street - Provides additional stopping power over ET300; low dust and little to no squeaking.
ET800: Advanced Street - For very adventurous street driving. Not for use on the track, as high temperatures will greatly accelerate pad wear. For track racing, use our XT-Series brake pads.
We recommend all brake pads are broken in with the rotor they will be used with, so a transfer of film is generated between the pad and rotor surface for optimal performance - whether you have new or used rotors.
Make 6 to 8 brakings from approx. 30-35 mph. Do not go below 25 mph.
Make an additional 3 to 4 hard brakings from approx. 50-55 mph. Do not go below 40 mph.
Allow 10-15 minutes for the brakes to cool off. Do not apply the parking brake during this cool down period.