Thanks for the encouragement!

To test how they perform I was actually going to see if you would be interested in testing three different types on your dyno, all I can do here is start and run them but the closest dyno centre is thousands of kilometres away. Perhaps we could sort out an arrangement Simon? I'm happy to pay for the testing if you are able to provide a controlled platform on which the manifolds could be fitted.

As for the RHS I'm a bit confused what you are asking, I used 3mm plate to build the shroud that leads to the flange, the pipe is big stuff at 42od so I really haven't got much movement. If I had some tighter, lighter bends I would be able to move them around a bit more.

The baffled divider was a fluke being that long, I left it there.