Port Size on a 5 cubic feet 15" L7 box?

[yota_fanatic]

I have everything except the port size on my box. It can't be any longer than 14.75 because that's all the deeper my box is. I only need the width and depth, height is 16".

[ContourSPL]

It doesn't need to be that big...what vehicle are you going to use?

[yota_fanatic]

I already have the box and stuff cut out, just waiting on figuring out the port sizes and stuff. It's a Toyota 4Runner