Are the front tires wearing OK? Any camber kit installed?

I had Bilstein HD's with H&R OEM sport (only about 3/4 inch drop) with 205/50/15 tires. After replacing all the front and rear parts, I got some Kumho's. The fronts wore out very fast on the inside edge causing the steering to become very unstable. The more they wore out, the more unstable. I switched to a longer wearing tire, switched to 195/60/15 and went back to stock springs. Steering better now.

This also happened about two years ago when the trailing arm bushings were going (rear steering). So check the arse end of your car also.

It could be the steering rack also, but I don't know what it feels like when it starts wearing out. I thought for sure that was my problem.