I finished making the other two. They need some finishing body work, and I'll weld in material on the cuts and try and blend them smooth after install.
I made the entrance to the first one a bit longer since its going to be fairly close to the throttle body. They are just hanging there, the middle one squares up when held in place.
To make them was fairly crude. Take a flat piece of metal, cut some lines in the middle and hammer away. I took a piece of pipe I had and cut it in half then welded it to bolt to clamp in the vise. Then found a socket in my spare socket drawer that fit nicely in it and started hammering away. I used my anvil to finish up the corners.
I've welded up almost all the gaps around the runners and the pipe now, so its mostly sealed. I have the most difficult part left, which is between the runners as it passes through the pipe wall left.
