You might want to compare them AZ rotors with wearever ones from AdvanceAuto/PartsAmerica. The AZ ones (tried all their brands and several of each) would not fit my wifes Olds right, went to AA and got some Raybestos and fit right the first try. At that point I was tired of 'trying' and wanted to finish it so I spent over 2x as much for their best Raybestos. I did look at the Wearevers and they were noticably thicker rotors, I was impressed.

I am more than dis-satisfied with AZ parts over the last 2-3 years.