Actually, most cars have them in unsealed rear trunks with nothing but some upholstery foam between them and the passenger cabin. Not like our cars at all. I don't think you're going to like it and it's going to be farting air through the seal.
What size is that sub? I kind of like what this person did, but I'd stick with my smaller 8" kicker and 0.5 cubic foot enclosure. Best of luck!
