using SCIENCE to ELIMINATE exhaust drone: I FINALLY did it!
how to eliminate exhaust drone | Acura RSX, ILX and Honda EP3 Forum
UPDATE IV: Exhaust Drone - X-pipe flute?. See Post 72 - Page 5 - Rennlist - Porsche Discussion Forums
Stop the Drone - Helmholtz Style - Page 27 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
Exhaust Drone Removal - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)