Here is what I did, simple yet very efective. I took 6 of the dubro Pushrod Exits and placed them equal distance apart from each other and right at the portion of the bypass where it starts to turn up towards the pipe. I placed them facing the rear intake. This way it is picking up the left over air so to speak that spills over from the intake inside the bypass and routes it towards the outer portion of the duall wall pipe.

I wish my camera was working I would take a picture for you. My crude graphic here hopefully will explain it a little better. The red circles is where I placed the Exits. Hope this helps.