Type of subwoofer enclosures.?

Ok, first of all, JL W7 13's Require a ported box, not a bandp (with plexigl). Also, because you have a sedan does not make a difference of how your speakers should face. You need to have the speakers facing your trunk and pushed all the way back to the seat. That will allow enough air flow compression to get the hit you want. Yoyu have a very powerful system, so I would also recommend a capacitor. I would suggest getting a foam liner for your trunk otherwise you will rattle worse than a snake. I had 2 W7's with the 1000/1 Mono's and I also recommend a 2 Gauge with from your battery to your Power block and than 4 gauge to each amp and capacitor. Let me know if you need any other help. Good Luck