So im pretty sure not many people are still getting headers from xiogary.
But i recently got mine and it just doesnt line up with the stock manifold gaskets.
Causing a pretty bad exhaust leak.
It turned out to be a pretty easy fix, after a few tries and a bit of unnecessary work.
If you drill out the bolt holes a bit higher, increacing the gap as you go left to right
until you end with about a 1/8" gap on the final one,
the gasket will hang just enough to cover the header and get rid of the leak.
I used the far left bolt hole as a pivot point so the rest of the gasket would remain mostly unmoved.
Hopefully this helps someone.