The Akra slip-ons came with factory certification and are fully street legal, so do not take any shit from cops on this one. Full systems however are the different story and it is not the dB level that is the problem but the lack of catalitic converter in it. They can ping you for this one as the vehicle will not meet the EPA emission levels. There is no way around this one unless you get certification that the emission levels of the exhaust system (any but the OEM) are within legal limits. Akrapovic does not certify any full systems for an use on public roads.
"It is not a shame to not know, the shame is to not know and not to ask"