Thanks, some more coming on.
I started working on the exhaust. This will be made of Aluminium and I started with a lenght of installation tubing. First it is widened to 38mm to fit the downpipe. For this I painted all the tube with marker and heated it, until the marker vanished - that's a very easy method to determine the correct temperature. At the beginning only the furthermost part, that's going to be widened:
Then, using a fitting piece of round stock driven into it with a hammer, it's widened:
After that I heated the whole tube and the following tool was used:
It's a modified drill press, with a prism and an HSS tool attached:
It allows to create such holes:
If you do that for some time and take a little care about positioning, this is what you get:
It's going to be the absorber parts of my silencer. We'll see, if it works
For now, the sight through the pipe is spectacular
So long,
Andreas