ax600
10+ year member
CarAudio.com Elite
It may be easier to just ditch the narrow back seat the back seat should split 60/40 . I did that for a while in my tundra. This allowes enough room for a dd9515 aero ported plus i still had some back seating area. But now i said fuckit , removed the seat all togather and now run two 18's in a large aero ported box. I still have my ported wedge box for the 15 it should fit in your titan no prob.