the box fits very well into the trunk.
as a matter of fact the v6v2 boxes seem to have almost the exact same angle as the seat back in the trunk.
it is possible to get the 13w6v2 in there, but it snugs up pretty tight against the seat belt tensioner.
fyi: 800watts is a bit high for a w6v2. jl recommends 400-500w for that speaker.
i would look into the jl 500x1 amp or if you want rockford. then maybe the 501bd or 1001bd.
the former gives 500w @ 2 ohms, the latter gives [email protected] 4 ohms & 1000 @ 2 ohms if you change subs down the road