You have it backwards, a larger rear bar increases oversteer. The reason the rear bar is small from the factory is to increase controllable understeer which makes the car easier to drive for the average person.If you go too crazy in the rear it will make the car plow (understeer) going beyond 19, unless you are doing other mods and going to the track, is a waste. The TSX bar is a good OEM swap. A torsion bar should have no impact on a straight road, only on curves. If you do decide to go with a 19 or greater bar, make sure you upgrade your end links as well
Are you sure about that? If so, then this car somehow works different from "normal cars". Increasing rear anti-roll bar normally decreases understeer. Going too large in the front normally makes the car plow (understeer).If you go too crazy in the rear it will make the car plow (understeer) going beyond 19, unless you are doing other mods and going to the track, is a waste.
Yes, you are correct, however, oversteer is generally more dangerous than understeer. and that is why passenger cars come with thicker front bars. If you go big in the rear only you can end up swapping ends if you lose it in a turn. Changing both as you suggest should do the trick.Bigger in the rear increases oversteer. The bigger the front the more under steer. Go big or go home= Acura TL awd front and rear lol