Hi, I purchased front brakes and rotors from O'Reilly Auto Parts, for my 2006 Porsche Cayenne. Máy nén khí fusheng The brakes were grinding while stopping the car, so I went to O'Reilly and talked to them about the problem. They suggested that I get different pads. I ordered different brake pads, installed them and returned the others. Now the second round of pads are making that grinding sound again while stopping the car. I checked the rotors and they seem to be fine. Is there special pads that will not make that grinding sound? If so, where is a good place to get them from?