the pods were full fiberglass and sealed, i think about 2.5L from memory, my current daily (the F100) is getting more extreme dash work with a full custom facia, so far it has the same tang bands and SB acoustics SB29RDNC tweeters running active off the head unit and a Fusion Encounter 10" sub in a tapped horn as the center console running off a Schneider 85w 2 channel
not as energy efficient or light as my previous setup but sounds much better already, still need a lot of work done on the dash speakers to get them more on axis and in appropriatly sized ported enclosures and i think il redo the sub as im not happy with the low end extension (below 35hz lol)