well...compair how much room you have available in your trunk and how much room the specs for your subs ask for...i'm sure there are a few people here that would be happy to help with box measurements but we need some kind of starting point...
I'm having some difficulty locating the required stats on the volumetric figure for these subs..... However boot space is about 765mm length, 500mm depth and 400mm height. I'll see if i can find anything more specific.
Woops.... Its 765mm Width, 500mm deep and 400mm height. Time for me to go home and hit the sack. Thats if i dont have a microsleep on the way home from work.