Here is an interesting tutorial on how to install speakers in the 4Runners. It applies to the 2002 to 2009 years. Anyone installed their own speakers? Did it take you the full three hours or so to do it?
It is always nice to be able to upgrade the speaker systems. I have concerns about wanting to listen to my music and turn it up. My speakers do not handle it very well.
What speaker systems do most of you use in your Toyotas? The standard ones, or do you also upgrade? If so, what brand do you like?