Go ahead. Buy an ebay tubular manifold......
1 in 10 seems to hold up great.
Like those odds?
Are you building a show piece or something you can actually beat on day in, day out?
YOU can use some engine bracket shit to bolt the turbo flange to so the weight of the thing isn't supported by thin gauge shit piping.
Really. Look at china's infrastructure. They use soda cans and cardboard as FILLER in "concrete" buildings. Maybe that's just their way of controlling the population and later blaming it on "god".