I custom made an EGR pipe using part of the old air injection tube, and part of the Magnum EGR tube, then welded them together. I plugged up the air injection holes in the manifold with core plugs. This brings me to another point that I discovered, there are two different types of passenger manifolds, both of which have the same part number. Most seem to have U shaped air injection holes, but mine had round holes, and the only difference from the outside is where the slashes cross there is a circle, and it is in a different spot on the two different types of manifolds. Most have the circle in the center, but mine had it in the second spot to the left. This made it a lot easier to plug up the holes, as it is impossible to put core plugs in u shaped holes. I also drilled a hole in the manifold to connect the air injection part to the exhaust part.