Hi there - actually I was worried if the performance B6s were going to be too stiff vs the B4s, but the ones I installed are great. Car rides smooth on most roads and isn’t wallow Over undulations as the old set did. But the most improvement is at high speed and on curves, the car handled unbelievably well and gives me so much more confidence than the original set did. The stability at higher speed is also noticeable. If you’re considering replacing the original OEMs highly recommend the B6s, it does not make the car ride rougher as I was worried about.