You are the "rocket man" but from my past experience with V-twins less restricted pipes gave slightly more top end hp but low end torque really suffered. When I increase the back pressure by installing some restriction, torque came back. With my diesel truck, it's not an issue because the thing is turbocharged.
In order to set my rig up optimally should I gut the exhaust, cat converters, and restriction box? After doing these things does the ECU automatically adjust fuel for the new air? I know that once the pulling and cutting starts, there ain't no going back. My machine is stock so I am just a bit afraid of screwing this up causing disaster.