up antiroll bars are a tuning aid, depends how you drive, what surface you drive on, mainly long corners, or mainly tight corners, mixture of both, etc etc. also to fine tune the antiroll bar, you can vary the length of the drop links, which alters the leverage on the bar. antiroll bar on the front produces under steer, antiroll bar on the rear produces oversteer, antiroll bar both front and rear..,slight oversteer, but obviously a lot less body roll. etc etc etc, so many options.