I find the Tein S-tech two low and too softly sprung. for any real performance application. It's designed as a "style master" and that's were it stands, you can always add some spring blocks to raise the ride. also did you make sure the installer got the fronts and rears correct. as the rears on that application are most likley siginfigantly lower rate.

If you need me to look at it, stop by or call 813-333-1100