they modded the wrong port. i have seen booster holes/ports under the exhaust port but that looks to have the opposite effect. Instead of increasing air flow that looks to me (i am no expert) like it would decrease the airflow and actually not only produce drag but reverberate against the tune in the pipe.
just looked agian. They modded the block not the sleeve. That makes no sense whatsoever. looks like it would just cause a dead zone. Literaly trapping the air between the block and pipe. Man that is wack