I actually have the Fsport rear sway bar on my F...makes a huge difference in a good way. To me the stock F had a significant amount of understeer and sway, after the Fsport rear bar my F feels more neutral and much less sway when taking aggressive turns. I definately recommend it.F-Sport parts are specific for the IS250/350 line only. You can use the rear sway bar on the IS F, but that will just induce more oversteer, something you don't want unless you're planning to drift your F.
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.Interesting, I had thought they were more or less the same. What are we talkin about here, softer or stiffer on the F-sport.
