Depends on where it's made from what I've been told by the local trubo guru's. Many of those Chinese made manifolds use an inferior stainless, it will actually begin corroding soon after install. They are also know for cracking after just a few hours of run time. I'm sure there's probably good ones out there, but all the ones I've seen that were built to be durable were made out of pretty heavy wall tubing, making the manifold itself pretty heavy. I've looked at and held a bunch of quality built turbo manifolds and most of them were as heavy if not heavier than a stock manifold, the cheap Chinese made ones were quite light, much like the first one I built. It lasted less than 6 months, and that was with several repairs. That's when I finally built a good one out of heavy wall stainless. Schedule 40 grade 304.
I imagine you could add some bracing to support the turbo and help with vibration damping, but the thinness of the tubing walls will do more than just deteriorate and crack, it doesn't hold in the heat very well, and the heat is what really runs the turbine side. It also requires much more heat sheilding due to heat leakage and heat soak.
But hey, if your just building a toy, no big deal. Just be prepared to be under the hood regularly for repairs. Just sayin'.
