My 2004 CRV has a lot of road noise. I was told that there are plugs that are supposed to be installed in the underside of the vehicle as part of the dealer prep that never get installed. Because of this there is a lot of road noise. Has anyone actually installed this and seen a difference? My dealer has no idea about these plugs or is just playing stupid so they do not have to install for free what they should have installed in the first place as part of the dealer prep. Thanks Bertie Brink http://www.setdefault.com/bertieH