Ok I knew all that but it was a good explanation. When I said exactly like the stock i was thinking of the shape. Of course its thicker and solid instead of hollow. From my short experiance with the acura 19mm bar it seems like a beefier bar would augment the handling into an oversteering monster.
During my test drive on a curvy road I lost the rear end once without an intent to with brakes, etc.. I would imagine that if my bar was thicker than a:i would have been facing the other diraction in a ditch or b: I would have to take the turns slower.
Maybe I should mention that my shocks are set to 3/5 out of 5 so that contributes to oversteer as well but I never lost the rear with the stock sway bar in.
If u can elaborate on ur oversteer with the ST bar than please do. I'm sure u have lost the rear without forcing it on to the car.