The problem with any Ti exhaust is that it's impossible to bend correctly. You have to make pie-cuts for everything... time consuming, and not good for flow if you take short cuts. Looks rad when done right
Another problem is that you'll have to laser-cut the flanges, gets costly real quick when it takes 4x 4x 1/4"+ just to make one flange.
I'm interested to see what you come up with for pricing and design.