Interesting... a claimed 8db noise reduction versus other filters and it's still louder than stock...seems contradictory. 8db is really a huge number from just an air filter change, and almost harder to swallow than the +6hp gain.
I know it's not your field, but as an automotive engineer do you see any benefits to the MWR design? As a layman, the design certainly appears unique among filters (BMC/K&N looks to be same design as OEM with different filter media) and the option of the race filter to "tune" the plate position to optimize airflow also seems rational. But again that is my impression with no background in design or engineering.