My take on that it would be USA Federal law, soon know when you have the inspection done, nice looking combination. 

Congrats postie. Looks a terrific outfit. You’ll have a lot of fun out of that. 

I would probably do a quick test - find an app on your phone like Steelo suggested. I would be surprised if screaming eagle pipes are 80 db? I have generally found screaming eagle to be louder than legal - but not too bad

if it was me, id turn up with the bike like an excited schoolkid and practically dare them to say something. if i was an inspector id probably spend the whole time oogling it.  you just don't see outfits looking that good.  good luck. sorry about the caps, holding the dog in one arm..

How did you get it from Western Australia  Postie?

Very funny bb