so far the set up in my sig is working great for me. I tow a lot and heavier then I should, and I am very happy with the super b special. Twinns ofcourse would be better, but I don't/didn't have the budget for them. THey say the special will support 575-600hp. It spools a tiny bit slower then stock, but that got better with the intake horn.
The egts are great and soon as the turbo lites i hit 30 to 45 pounds of boost instantly depending on how far down the go pedal is.
For daily driving I really like it. I tow a tractor and 12k excavator on a gooseneck over the pass often and it works great.
If you go with BD and don't do the towing twinns, get the super b special NOT the super B single. The special will work much better for you if you are staying with a single turbo.
Just my 2 cents worth.
Good luck with whatever you decide!!!
:headbang: