My rears were -2.2 degrees camber from factory. Factory tolerances are somthing like -1.6 to -2.2. Pretty wide tolerance and mine were at the upper range of normal. Once I lowered my car I had -2.6 on one side, -2.7 on the other. I got the spc camber kit and brought it back to -2.2.
Before/after pictures are in this link.