It says they are 6.6" subs. Has anyone pulled these out and would 8's fit back in, or about how much work would be needed to make a switch like that? I find the stereo about the worst feature of this wonderful car. I find that I can only get no bass to a boomy sounding bass and I'm looking for clean and clear bass notes. I don't find that these 6's hit quite low enough to be of much use and then they seem to over power the mid bass range. IMO! What has anyone else done for simple upgrades to the sound system?

Thanks, John