whats the displacement on those woofers? .2 cubes combined. I highly doubt its going to be any louder. especailly in a kicker prefab thats tuned high as hell. A box made for those subs. in theory a bigger box will be more effective if you are underpowering. it also has its disadvantages. and with those rinky dinks i dont think its going to make a whole lot of difference. you can only polish a turd so much.
Oh and every person on that fucking facebook posting needs to learn how to fucking type.