ECS

If it has not been said, you need GT3 control arms up front to get reasonable camber (with shims). The back is fine. This is not expensive and well worth the cost given you won't end up wearing the outsides prematurely. I run -2.6 front and -2.3 rears. This is pretty close to what the rest of the guys run. And, in combo with street/track use they wear just about perfectly.