Ok so this cop, apparently, has heard a stock exhuast setup and your specific exhaust (HKS). When they were handing out these tickets did they have a decibelmeter certified by any agency. Is the cop sae trained and certified to properly test the exhaust decibel level?
I am impressed, however, with the amount of research you did on this and that you actually read the statues (zzzz...)
There were a lot of angles to play on this and hind sight is alwasy 20/20. Great job and thanks for the posting all this great information for the rest of us.