I have that same pipe from RC showcase it seamed to heavy to me and it
did not fit my plane and canister, so I called Desert Aircraft.
I bought from DA flange three 90 degree and 2 straight pipes you may need
more or less the pipes snap together then they can be silver soldered (brazed).
The pipes I bought were 28 MM they also have 25MM ask Dave or Brian they
are very helpful. Don't forget to get coupler and clamps to match both pipe
and muffler size I've attached a couple of pictures to help. Check my web
site for header build pages. You can see the torch I bought from Home Depot
about $40.00 don't forget to get silver rods from DA for brazing.
Thanks