I would highly suggest to forget the strut bars and buy a set of good (read: good, new doesn't always mean good) tires, in my honestt opinion chassis stiffening should be the last step as far as handling goes, and for a street car, I doubt you'll see any noticeable differences and unless you got cash lying 'round. You'll see the MOST difference from buying a good set of tires (and you can quote me on this). And Kumho 712 isn't good, it's just ok, just to give you an idea of what type of tires to look for.