Box outer dimensions (.75 mdf) - 40" x 13.75" x 8.5" = 1.91 cubes After subs, ports and bracing = 1.65 cubes Box will house four E8's firing up. I have 10' of 2" pvc so I'd like to use it since it's free. Will two 2" ports 8.56" long tuned to 34hz give me good output? Also I have a choice of firing the ports down or to either the driver or passenger side, do not have room to fire up with subs. Give me your thoughts please on this design. Power comes from a Sundown SAE-1200D = 1200 watts @ 1 ohm @ 12.8 volts. Box will be behind the seats, raised off the floor, in a small MR2 with about 30 - 35 cubic feet of interior volume.