I agree I have the rear sway bar and it does make a difference in a positive way. I can rip around turns faster then when it was stock. Also less body roll. I don't feel any oversteer on back roads.The Fsport rear sway bar is 19mm and the stock is 16mm. That 3mm difference makes one hell of a difference! It doesn't do anything in regards to ride quality...still the same stock dampening, because you haven't really messed with the springs or anything, just that there is a lot less sway with the F sport bar and it feels much more tighter and easer to control on tight turns.