I had one of those, and they're completely different than a b-pipe. There is a water jacket between the manifold and headpipe. The mating surface looks like the pic I attached.(I can't draw very good either) So the head pipe gets water directly from the manifold and the head. I don't know if both holes connect to all 3 fittings on the headpipe or if they are separate water jackets. The manifold also feeds water to the cylinders like every other exhaust. I only had single cooling, so I ran the lines like the pic I posted a few threads up. The only thing I did different was put a tee in the line going to the stinger for a pisser to dry the waterbox out a little. For dual cooling I would just run the other line off the head to another pisser, and make sure you have good pressure coming out both of them. Then adjust restrictors to get the water temp where you want it.