I am trying to think of my set up when I had 201kw ...
OK ... Just checked the old car domain page...
When I was getting 200kw, it was on 17psi... I had rebuilt the engine, put in forgies and stuff, and copper Tomei head gasket... Everything else was stock ... I had upped the injectors, but the intake manifold was all standard... At this stage I was also running the Garrett GT30 turbo, K&N air filter, and also had the EMS 8860 ECU....
Not all of that would be needed, but that was pretty low boost, and was very reliable... I had no drama's what so ever...