There is actually a hole right behind the battery tray in the firewall that will allow you to run your power wire through. You have to remove the battery and I believe the tray it sits on if I remember correctly. You can't miss it once they are out of the way. It makes running power wire very easy. I had my amps in the hatch area, due to the seat movement. I wanted them behind the seat, but most amps are too big and limit the amount of seat travel. The mounting depth of the 6" subs is pretty shallow, I looked all over and actually had some of the JL Audio 6.5" subs laying around but they would not fit. You are better off going with a sub enclosure in the hatch area. It would be cool to build a false floor using some of the new JL Audio shallow mount subs....the are only 2.5" in depth!

Good Luck with your system!