I recently purchased the RK SPORT Sub box to replace my back seat. I just cut the holes out for my subs to fit into and I am wondering what others have done with this box as far as making the box stay permenantly. Did u guys screw the box to the floor ? Also did u guys make a sperate box behind each sub out of mdf ? I know that if u dont make a seperate box out of mdf to put behind each sub then the subs will not pound very hard and the box could rattle and come loose ? Let me know what u guys did with ur rk sport boxs ?

I think I read someone that the box is just a cover and that you have to make a custom box behind it. I'm not sure, hopefully someone else can answer better.

You're going to have to make a box for the subs.