Ok... is it an approved sparky?  I know the FMF ones are USFS approved... to ride in Maine you must have a USFS aprroved sparky (they look for the stamping)... they also require a 96 db.... the turn down tip may help, but I would just pay the fine for noise, but you goota have the sparky....
I just think this would be an attractive route to go w/ the DCS pipes for those that are under tighter restrictions...and I think they aren't going to get any looser w/ them in the future....
Just a thought... not sure if it's a cost viable option to design it to run w/ the FMF or not...