[dakota_john]

Check this link out--> http://www.supercrewsound.com/shop/detail/11/91.htm

Quad Cab subs that fit behind the rear seats for $109.00, plus S&H!

 

[bigtexantim]

$20 sheet of mdf < $109+shipping&handling

they gave you the dimensions of the box right there for what you need to fit behind the seat... no need to make a template or anything... just watch the thickness of your board if you use anything different than their 5/8". you could even tweak it to fit your application.



or you could spend more than 5 times as much...

 

[BlackDak]

That's a good point. Thanks for the link, I'll be using the specs provided to make my own boxes...