i have noticed recently that my car has some understeer to it.I was just wondering what i could do to get rid of this understeer.I know my front tires have a lot to do with it but what are some other things?

my set up is-95 240sx se
-192,XXX miles (therefore no kind of good bushings or mounts)
-eibach springs(the red ones?)
-kyb struts
-front tires Classic Radial sr,size 205/55/16
-rear tires Pirelli P6000 ,size 205/55/16

and thats it for the suspension mods.Thanks in advance for your help