I think it's only a matter of time before the wowsers out there apply more regs regarding noise from overly loud pipes. As usual the obnoxiously noisy pipes out there being the lowest common denominator in the community have had the effect of forcing apon us noise regulation amendments.
That is one of the main reasons why I bought the Staintune pipes as they are what we call in Aus, ADR (Aus Design Rule) compliant.
Of course that's only as long as I keep the restrictors left in, which as a matter of fact I'm taking out today

The beauty is though, it only takes 5 minutes to put the restrictors back in if need be due to me being pulled up by our boys in blue or whatever.
I have believed for some time now we'll be seeing more pipes with easily removable and reinstallable restrictors (ie 2 grub screws)as they give us the ability to stay noise reg compliant if required but also, to be a little louder if we see fit for safety reasons of course.
That's the beauty of having an adjustable set of pipes as they in my case allow me the options of restrictors in or out but equally important, I now have the compliance sticker which I suspect all the law enforcement guys will be checking for.
Anyway, Worse case scenario, 5 mins and your compliant again.
Don't get me wrong guys, I too enjoy the sound of a deep throated pipe even if I did change from SS to the tunes, but over here we also have the Harley brigade roaring around and upsetting the masses too which I believe would have had much to do with noise reg changes.
