I think I'll buy Eibach lowering springs for my car. Do I need the alignment kit?

you should get your car alligned after intsalling lowering springs, but there is no "kit" per se to do that... just go to a shop, and it is usually pretty cheap. If you are worried about camber, don't be. It is not affected too much by lowering springs.

Same stuff he^^said. You don't have to worry about camber with lowering springs unless you lower it more than 2 inches.