Have used that pipe work on test cell exhaust connections for years, eventually it fails and leaks - there's far less vibrations/pressure in a static cell than on vehicle.
In short, it won't work.
If you're really cost conscious, build your own. Once you've done it, you'll appreciate the work that's involved, and those pieces of bent pipe will seem excellent value
I've got a spare manifold from someone pulling out the group buy if it is of interest.
Cheers
Pete