In your case nsusammyeb you should run some shorter straight runners unless you are planning on testing and changing the length a hundred times. They are the easiest design you can just throw on and see some power gains.
Your next concern should be the plenum design, you are going to have around a 2 liter plenum since you have 2L of displacement. If you tamper with plenum volumes you might end up worse off than you started. The plenum should taper to try and get equal air flow to each cylinder 1/4 increment smaller from the throttle body on down. This doesn't effect power as much but engine life.
Here are some ideal designs that funnel intake air well to each cylinder for you to think about these might have even more potential NA with resonance coming into play.
Dual Plenum Intake Manifold - K20A.org .:. The K Series Source . Honda / Acura K20a k24a Engine Forum
You don't have to worry about resonance since you are talking about a turbo car, but there are a few things like the funnel shape feeding the runners inside the plenum. They don't need to protrude they can be recessed with equally as good results.