Which would be a valid point, except the NS work in smaller boxes than normal subs...
Normally, I would suggest going with a smaller sub, but I know those Rams have alot of space behind the seats...I say go for it, be something different.
I remember on the ED forums //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif a couple of years ago, guy fiberglassed a pair of 190.v2 18s sealed behind his seat, so its def possible.