Denis was smart and welded the top of the stock outlet on facing forwards. I used normal 2" (I think) alloy pipe.
Get you stock outlet, some alloy tube around 2" ID, a bit of alloy plate, and a bunch of tools.
Chop off the part of the outlet that sticks up, cut a piece of plate to size to fit over this hole.
Drill some holes in the forward facing side of the outlet, file this out until it the correct size. Chop a piece of pipe at a nice angle so it points straight out forward (or use the stock outlet piece a la Denis). Mess around until your new outlet pipe fits nicely over the new hole.
Mark how all parts should fit and take it to a welder. Get them to weld some bumps around the lip so your IC piping doesn't blow off. More than $20 is too much.