I purchased these rotors for just the front set for my 2000 Buick Park Avenue. They installed without a problem and fit perfectly. I also installed Hawk ceramic brake pads. This combination has created a very smooth braking that is deceptive. This may be due in part to how my individual car's brakng system is set up, but unless I slam on the brakes or really increase the pedal pressure, the car slows gently and is not jarred. Now, just this last week, I finally had to really step on the brakes and they definitely show a big improvement over the past rotors and stopped my car quickly but with no fuss like shuddering or undue vibrations. Just a quick, smooth stop.