Non mandrel bent exhaust?

I imagine the amount of restiction could be calculated if the degree and
number of bends where known.
Is there a reason you have to go with a kinked pipe instead of a mandrel bent pipe?
I think the turbulence in the gas flow is more a problem than the restriction
of the pipe.
I have to vote with rumble and Prine, I'd do the 2.5 jegs pipes.
That is what I have for mine, if you need a pic of the system mines
still in the box and I could get you some.