I have V&H splip ons, but they had 2 1/4" baffles. I felt a drop off in tq, but added 1 BCT header baffle to the left side head pipe and it brought the tq back up. Almost flows like stock or Fuel Moto's asymetrical pipes, where the left side is more of a sound chamber and right side pipe flows the most.
Now, if I switch to new pipes that have smaller baffles (i.e. 1.5") or V&H power duals, I'll take out the BCT header baffle.
Ride safe and have fun.