You can try and face sube in all directions ans see which one you like best. But majority of the people like the sound when they are facing the trunk.

I had 2 12" fosgates. It sounded good but I wanted more room in the trunk so I went with a bandpass box and just used one of mine subs. I think it sounds wayyyy better now.

.http://www.partsexpress.com/pe/showd..._ID=5848&DID=7

You can go to parts express & they have foam baffles for some speaker sizes. Test them out and see how well they fit, then if you want you could make a fiberglass case for them.

i would deffinately would face them in the trunk towards the rear of the car and let them load off of the trunk. the closer the speakers are to the loading surface (the back of the trunk in this case), the louder it will be, but may lose some clarity, but i would only do this for nething under a 15 inch speaker. if u build a big box, it is also a good idea to let them load off of the rear window through the empty 6 by 9 holes that worked better for me but im not sure if it would work as well if the speakers are too far away from the loading surface ( the rear window in this case)

band pass use all the trunk space for air in a way

Bandpass is louder but you get sloppy bass in return. As far as having the loading surface closer to the subs. A person would practically lose function of their trunk to set it up right. Or you can just build a box and have them hit off of each other.

I would go with 12'* MTX or JL audio
Either sealed or transmission line.

if u face them towards each other ull get too much cancelation

I would recommend buying from
www.purecaraudio.com

Best prices by far

try nexxon.com, the zeb.com, and maybe ikesound.com those are about the best ive found im not really a fan of mtx, they inflate their ratings, but jl is good. ive ordered from each of those sites and theyve all done me good so far.