Re: Expansion chamber header pipe angle question
While I'm sure you are in fact reducing flow with this setup, I doubt you would notice any difference if you did it differently. Your setup should work just fine if it holds together.
The china dolls simply don't have the power for this to be a problem issue unless you get real silly laying out the pipe routing.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.