This pic is a design i came up with in Paint. the first two use six 3" aero or PVC ports, whichever. the third uses two 6" areo or PVC ports.
Out of the three, which design would work better? I am debating on having the ports firing up or on the same plane as the sub. This will be in an ex. cab truck.
I know that the exit of the ports should be as close to the sub on the outside as possible, thats why I am favoring the 3rd option with 2 6" ports that are a lil over 26" long