Was built for a dd 3515 its about 4 3/4 after disp tuned to 38 sounded good I am gona sell my suv and have no use for it. The front baffle will need to be redone on it just a new board over it and cut a new hole or turn it into a 18, it was trimmed out around it to fit a mtx rfl and thats larger then a 15. Local pickup.... shipping I dont know but this is very heavy and I would imagine it would be alot.Needs carpet on it as well because I blew the dd and never bothered to get it carpeted. It was built by viper118. There is a vid on the realm of it with the 15 and a 2500d doing 145.2 on a tl and it was not really played with for larger numbers it is a daily driver box.