I am looking to get subs in my extended cab, anyone have boxes that would fit one or two subs underneath the back seats. I have seen a couple but am looking for more opinions.

 

I got mine from supercrewsound.com they make single and dual setups. Don't know if you found them already. Short of making a custom box I think your options are limited for these trucks

 

I went with a dual 10 inch sealed box from Foxbox. fits underneath the seats in my scab and doesnt stick out. The box is also covered in a linex type material which is pretty neat. I don't have the system installed yet but the box seems to be good quality.

 

I can say the fox box is the way to go. Mine sounds amazing.