i was thinking of one but i think with the system i have the 12 inch in a box will do.

if u cant find a free-air 8" sub u can always get a normal 8" sub and then put a tube underneath it and make it look like a pillar. and if u really want intergrate an amp into it...would look good and sound decent.....if u want real bass go 10" for doof doof and 12" for the deep low bass (RnB).

but yeah to put in the free-air 8" just pull the rear parcel shelf off and slot it in. =D

phong =P~