found the zoomers a bit loud in around town driving (great at highway speeds). placed a call to zoomers and spoke to the owner- they are sending me a resonator designed to be attached post muffler before the y split. now get this--- no charge and shipped the same day---now that is customer service ( they say around 25% of mini systems they sell request the resonator.

 

got the resonator yesterday and had it installed (must cut and weld) tight fit but no rattles. what a difference-- still has great tone but no longer super irritating and the volume is perfect. this mod should definitely be incorperated into the system at the factory