Gray

I know full well the changes a larger sway bar will make and the benefits there in. I'm not saying that a 3mm change will be minimal, but rather I question it's impact during highway driving and the effect on wandering. That's all. But apparently the anecdotal buttdyno evidence shows otherwise. I am glad to know these types of modifications/improvements are available for the vehicle.

Fair enough.

If remain skeptical that a 3MM change in the diameter of the RSB would do that, but I guess anything is possible. If I end up buying the vehicle I'll be testing this theory myself then.

Agreed, fredrik94087. I've installed a larger RSB on every Subaru I've owned.

We are on the same page then. I felt it was important to say since there seemed to be a notion in this thread that a bigger RSB would somehow correct highway wandering/steering.

I have a hard time believing the RSB has anything to do the car wandering on the highway and that a larger bar would help that. The sway bar limits or allows for body roll and the suspension has to be engaged (as in turning) for it to work. A larger bar merely means the body rolls less so that energy transfers to the suspension and in turn the tires. A straight highway would not engage the rear antiroll bar IMHO.