I own a 2004 9-3 Linear. I would like to have some type of upgrade performed to make the drive less sensitive to bumps in the road and road noise (I'm talking about small bumps from normal street surfaces). Someone once explained to me that since I bought a 'sports vehicle', it is by nature sensitive to the surface of the road. If this is true, what I'd like to do is make it less sensitive, for a 'smoother', quieter drive. Any suggestions or experiences with this type of upgrade? Thanks.