Also if you use a large pipe for the log part of the manifold you can cut it out and add a flat plate to clear the headers. Just leave room for a heat shield. Without it stock manifold could make more power because of charge temps and boost leves that can be support with lower intake charge temps.
If i was going bannas with a 4 banger i would use itbs and a log type collector for boost. I have a system like this i am welding up for my civic. Should work good its a much bigger hole than before and i plan to up the boost alot along with it.