I've always found that it is better to have the woofers firing towards the rear of the vehicle. Allows you to hear the bass through it's entire wave. Remember the human ear can't perceive direction on bass, so you are better off giving them the most room possible.
Yeah I understand all that but I was basically thinking about just a slight angle of the sub in order to keep if from firing right at the back but I guess it really shouldnt matter too much. I was just wondering about the pre fab boxes though. They look like they are made to be pushed up against the seat which seems a little messed up to me is there a reaon why they do that? I plan on my making mine point into the trunk.
Yeah, truthfully I'm not sure about why they are made that way, I also have an angled Kicker Stillwater enclosure, and have wondered about that. My best guess is that you would probably be right.