Originally Posted by
Karl @ FPT
If you mean centre feed like an EFi manifold then that's a very poor design.
A nice bespoke manifold will always flow in from the side, the less bends from turbo to manifold the better and of course the internal design of the manifold makes a huge difference too.
Without a whole lot of fabrication yes, but a centre feed manifold will always distribute the air better than a side feed. Almost all side feeds that don't use an additional plenum to mimicking a centre feed have to restrict the air to get the airflow correct, most do this incorrectly as the OP has found out