I'm running 2 of those subs in a ported box, roughly 1 cube each, and they are violently loud. I am going to put them in a sealed box as I believe they will have very good SQ. They are super efficient, don't need a lot of power for a lot of noise. I have no doubt it'll be fine in the trunk assuming you are going strictly sq, but I agree that I would try to mount it up front.