I'd say try try explaining it just as these guys are saying. I'm sure you know, your car is loud as fock, and it may only be a matter of time before getting another one. He said your car "sounded like it had some illegal mods in it"? Jeez, what's up with that. What maybe cats, everything else can be made legal. As far as 25ft sound rule, I can hear stock vehicles at 25ft, I would seriously look into whether that applies to stereos, cause that's what it sounds like. Especially If he said it shouldn't be "heard" from that far (as opposed to being "obnoxious", or "bothersome" at that distance, which is a possibility for what the rule was meant as). Maybe you can make the argument that the officer was being too picky if he was using a 25ft rule (don't mention that he could've heard you from 100

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Sorry to hear about the ticket, always sucks to get caught for not doing anything wrong/harmful.
Neil - you always talk about food?