I am using the Power Stop rotors on all 4 corners. At the time that I installed these rotors, I also replaced the master cylinder, rebuilt all of the calipers, and installed the stainless brake lines. The difference is incredible, but still not as good as my Acura Integra or my beat-up Toyota p/u. At least I can now lock up the wheels. I am certain that these rotors make a difference, but with all of the changes I made at that time, the Power Stop difference could not be quantified. As a side note, I also replaced my Integra with the Power Stop rotors on all 4 corners and the difference was immediate. The car does stop shorter by a noticeable amount. The only downside is that they do not work too well until they have warmed up. That is, the brakes don't seem to start to grab until 2 or 3 stops. Sean Howley VIN#2345 > Today I ordered two front cross drilled rotors (Power Stop, > part#EBR424R, EBR424L) from Summit because my front rotors get enough diet in > 18 years. Yes, I have a question. Is anybody try this rotor. Could I please > that parts impression? I hope it is better than a stock one.