There isn’t much of an inlet path, the air filter box has a pipe which goes straight into the turbo.
I believe you can also get larger inter coolers which flow and cool better and may release a little more power especially if you have raised the boost.
I doubt anyone makes a different inlet manifold and doubt you’d make any power from one if they did. Things like that are more suited to naturally aspirated engines, or ultra high performance turbocharged engines.