Been using & have used XSPower manifold(s) for a while.
Absolutely
ZERO complaints other than clearance issues with, well, "big" turbo's.
I had some clearance issues with the compressor housing hitting the manifold,
but nothing a spacer couldn't fix.
This comment will not apply with everything coming out of China,
But the market and demand of "knock-off" parts is nothing like it used to be years ago.
As badly as I hate to admit it, some things coming from over seas sell and are very successful.
There's an astronomical number of people running these with great success...
Many with 700+HP figures.
edit: With no additional reinforcement, a 50lb turbo hasn't fallen off of it yet. :biglaugh:
Jeff