Tires play a major part in your handling indeed...
as to help a front/rear strut brace would help as well lower rear tie bar. the last thing that could also help would be to put in the sway bars.
You would notice a handling diff for sure....
hope this helps...
I have 15X7's w/ 195/50/15 Aurora's
Coilovers
Front and rear upper Strut bars...
