Need tips or tricks on how to make a loud daily setup

[caraudiolove]

i have 2 12" kicker comps in a 1999 monte carlo ls 2 door coupe

here are the dimensions

31.5W

32-35D

15H

the amp that im running is a 1600w ma audio synergy series

I would think that a 4th order would be the best for it because the sealed part of the enclosure

Need help on a 4th order design kinda confuse?

so any designs would help thanks!