I haven't tried it yet and I don't have the freak,, but 1 K&N filter in a restrictive airbox cannot hope to equal the airflow of the Freak with a K&N lashed to each carb.
You may get some improved performance, but the Freak maximizes the airflow. Once you apply performance exhaust (outflow) and proper jetting (fuel/air ratio), you are there.... The engine will breathe as well as it can, next step, bigger lungs....
