Consider a PSE. The factory unit has all the lovely noise with no drone. Of course you must sell your first born to be able to afford it.
FD Motorsports now sells a "pedro" version of the PSE for pretty cheap. You don't have the on-off switch, but you still elminate the drone and keep the volume at high revs. You can get it ceramic coated as well. Darin at FD is really good to work with. Tell him Mike from Lexington told you to call:
986 Sport Muffler
No affiliation.....yada yada