Practice mufflers

We water jet cut the shell and end caps and I bent the shell today and cut the perf. tubing and 45 degree pipes into the sections needed. I may get some welding done this week and need to go pick up some new 1" thick, 6 lb/cu ft. density Cer-Wool ceramic fiber.
The last photo shows a typical 3", three bolt header flange in the top right to let you all get a feel for the relative size of these.
Tom