Easy to understand why dyno info seemed unimportant to the V2 crowd...Its the same exact pipe as the V1 (lots of dyno info out there on it) with the exception of a 1/4" spacer welded in the very front of the head pipe..had to twist it a little different to fit because of the new Flange spacing it out another 1 1/2".  The new flange has a 1mm larger I.D.,  same O.D...they will interchange.  The added length moves the curve about 200 rpm earlier which is better for most riders.