I just got off the phone with the banks guys and they told me they do not offer a down pipe from the turbo back. He said all of their exhaust are from the cat back is this true and if it is who makes the turbo back to the exhaust I installed so I can straight pipe it.

In any truck magazine (Four Wheeler, Diesel Power...) Banks advertises the complete system for the dmax (you can see the downpipe on the picture..) and Banks really advertises a lot! I don't understand why they suddenly don't offer it for sale?
I think other vendors sell better quality than Banks anyway...

MBRP looks to have what you need, check with the supporting vendors of this site.

Banks does make a front pipe, I had one on my truck. There quality is as good as anyone, the exhaust fit great and aligned perfectly, it was just too loud for me so I took it off.

they do offer a head pipe, which is the 1st pipe connected to the down pipe. I don't know what you have for a truck, but if it has no cat, it will be the entire system (from the down pipe back) If it's got a cat it will more than likely be from the cat back, unless you decide to remove it.
banks exhaust is very nice, it fits great and sounds good, just remember there kits are made of 409 stainless, so it will corrode like your factory exhaust. mbrp makes a 304 stainless which stays looking good forever, but it's expensive.