Ahh, victims for me to question!!
JR, I agree with you to a point.
Your correct, an open exhaust can kill the torque.
I intend to keep 1 (Area P) muffler with the same ID as a ZG, to keep back pressure and reduce noise.
In properly designed header the exhaust flow is more efficient {in a specific RPM range}.
If this Header will work in the correct range,,, it will increase the flow of the intake ports, and alter the A/F ration {because of improved scavenging and proper control of the exhaust pulses}.
I'm hoping someone has information of past installs...
When you installed headers on your previous bikes, what was the result?
GPink/Cuda, what was the benefit or downfall of your ZX header installations?
Did you do anything else to control AF ratio etc?
What was the size of the Mid pipes?
Did you remove a Catalytic Converter?
Did you remove the flies?
End Goal. is EZ,,
I want Power!! Lots and lots of POWER!! Arr, arr, arr,,,,,,,,,

But I want it to be controllable, and have good low/mid torque...
ie: better than stock and a Full Area P.. But cheap!!
And, I want to keep the idea's coming.
Bekuz,,, I just like to discuss things...
Cuda, I already have hair on the palms of my hands.
I want to grow some on top of my err slightly balding head..

Ride safe, Ted