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No, that hole you see is for the PCV system. This manifold really doesn't change the path. The valves keep the manifold divided. One valve keeps the top devided (the one you see in the picture) and the other keeps the rear chamber divided. I forgot what the Firing order was but the valve just makes is so the resonance peaks occur near the next valve that's opening. It's kinda like mini FI from what I understand.
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--Marcelo
'06 Arctic Metallic 325i | Sport Package | 6MT | Dinan Stage III suspension | Dinan exhaust | 330i manifold swap! Click here! | Active Autowerke tune | 135i Brake Calipers | Deiselboost caliper brackets | E46 M3 front rotors |