I was wondering if there are design plans hanging around for a box for a 99 extended cab?

 

What kind of box are you looking to make (under the seat or replace seat, sealed or ported, one or two subs or more, what size of subs)?

I have a 2 cube box tuned to 28hz in mine. It totaly replaced the back seat though...

You will hardly fit a thing under there without a seatlift either. I suppose youve measured and everything already, but even with a seat lift 8 inches under there is pushing it IIRC.

Let me know what your looking to accomplish and I could probably draw something up for you if you would like.

 

I would like to keep my back seat basically need to hide the box from the wife lol

 

Unless you want to run an 8 or two in a small box, you're going to need a seat lift. What is the wifey worried about? Cost? You can build youself your own box and seat lift for $50. All mine cost me was $30 for the sheet of 3/4" mdf. Got the 4" c-channel aluminum for free from dad, guess working for a tool and die company has it's advantages. It should be available from any metal supply shop. Cut it to length, drill a few holes, and bam, instant seat lift.

 

sounds good. That gives me a place to start. thanks again