I wasn't exactly sure but after installing my wife's Honda Accord with Power Stop pads and discs they really liked them too. They work very well. You are quiet. It's slowing down a lot and after a monthly check they seem to be better than expected. After that I used the rotors and pads there on my friend's corvette with no problems. My 7.3 turbo diesel still has factory Motocraft rotors and calipers because I love my truck more than everyone else combined.