IPD Sway bars
I had the IPD sway bars installed a few weeks ago at the start of an epic drive with the 90. I had them put in down in Portland at the IPD shop (nice people).
So far I am very happy with them, it tightened the car right up. Now it feels like the back end actually wants to go to the same place as the front end. I flogged the 90 through the high desert and down the 101 (within reason, it's still a top heavy overweight SUV) and I much prefer the characteristics of the car with the new sway bars.
2006 XC90 V8 7 pass
1999 M3 cabrio