[Dimman]

Originally Posted by MSTiFK8R

I driven both solid and flex strut bars from STI (on Forester XT)

I may say they react pretty much same, giving sharper steering response and chasis solidness

the difference is when you drive on the harsh road with uneven surface - with the solid bar car tends to jump hitting a crack\hole\bump with both sides, even when the hole is at 1 side of the car

and driving with a flex one allows more vertical movement for each side of the car, leaving the other side in relative comfort, so as not bothering you with unnecesseary hit in the steering wheel

and concerning horizontal movements and corners - you will get the same stiffness from both bars

I hope this helps

Isn't that the suspension's job?