but what you are doing in the rear doesn't change the front, it changes the rear, you are simply rebalancing the car differently by decreasing rear grip.
As far as OEM's and how the cars are balanced, yes, they do tend heavily toward understeer; the Contour SVT however, is tuned far closer to nuetral than most FWD cars. A stock contour SVT will most definately oversteer under lift-throttle, or even trail braking if it is being driven to its limit (ask my Grand Am Cup crew chief how he knows this . . .) a stiffer rear bar simply makes this condition worse (depending on how you look at it) There are times, such as an autoX car, were it makes a lot of sense to force the car to be able to rotate faster at lower speeds, where this bar would be quite useful, but for higher speed tracks, or even on the street, it makes real limit driving a white knuckle experience.
Ask any real road course driver how they feel about a car that oversteers badly under braking.
