Not just sitting there on the bench maybe. A few heat cycles later, they might. Also is that turbo supported at all? If not that manifold WILL crack welds trying to hold the turbo up there.
What is up with that manifold too? did you guys cut the section off the cast manifold and weld on a piece of square tube?
I am usually not one to bash others work, but if the time and money was spent to do that, a little more time and a little more money it could have been done way better. Not saying the exhaust gasses wont go into the turbo, make boost and go from there… so I guess pretty isn’t a necessity, but the over all work I question the integrity on the work.
that’s all constructive criticism i will give for now.