My front brakes have regular 10.5" rotors on them and the rears look like what appear to be PBR brakes, aluminum calipers and what looks like a 12" rotor. I need to know what they are so i can order new pads and rotors. Did these come original on camaros? or what car are they off of so i can get them from autozone, is this the "performance package" that autozone calls it?

if the calipers are aluminum, and its not a 4th gen rear, then yes they are the pbr's

89-92 with four-wheel disc brakes would have rear PBR's.

JamesC