While they look much better than the weeny OEM ones when using 18" wheels, I can tell you they did nothing for stopping power or pedal effort. The vacuum booster in the Z32 is undersized and the pedal mount on the firewall weak. This observation applies to everyday driving. When running the Dragon (TN 128), which I did with both the OEM and StopTech brakes, the larger rotors did reduce fade marginally.