I'm in the planning stages of my next project, a Ultra Hots (12-14lb fun-fly)
The plan is to use a Brison 2.4 (40cc) I have lying around.
I'm toying with the idea of putting a canister exhaust on it.

Objectives, using the "stock" Bennett muffler as a baseline:

1. Jaw dropping low sound (I know prop selection is important - Separate discussion?)
2. No degradation in performance (More power would be nice)
3. Equal/better throttle response and linearity (No steps on/off the pipe)
4. Budget maximum 1lb added weight
5. Budget maximum $150 added cost

Based on what I have read, I figure a 50-60cc can would work well.
(Any specific suggestions from people who have done this on this size motor?)

I probably could fabricate the header using pieces from KS.
(How about 12-14in length 3/4in ID pipe to start?)
(What trade people might I approach to fabricate one for me?)

I understand how to adjust/tune the length on a bench setup.
(How short a header should I expect to end up with?)

Note this is a pretty small powerplant, and noise is reasonably easy to keep under control.
e.g. I have a J&A Pitts muffler on my other one, and it does the job well.
Question is, should I even bother or wait until I build something bigger? (100cc+)