Why buy a car and try to make it do something it was never designed to do? Suspension and chassis capability isn't something that could be improved merely by installing bars and tightening nuts. You need new springs and dampers and etc which would cost a bomb, and that would've made the purchase irrelevant in the first place. Worst, you will hardly get the right tuning after spending a bomb on those upgrades. Get the right car is a way better idea.