Maybe the cops just don't like the sound of 4 bangers - I know lots of loud V8 guys who have never been harassed for exhaust sound.
I can tell you one thing though... completely off topic... if any of you guys live near or in downtown, you better have a front license plate. Walked outside to my car the other morning and I had a nice parking ticket sitting on my windshield for $75!!! $75 for no front license plate! Thought that was a little excessive... I mean $25 would have sufficed and I would have got the message.