A couple years back, I was headed home from the airport around 2am. Almost nobody on the road and I'm doing 85-90 in my Prelude with a Greddy exhaust.
I spotted the cruiser sitting in the median and let off on the gas. He lit up and chased me down.
I lowered the window and said "What's the problem Sir?" He answered "When you saw me and let off on the gas...it sounded like a truck with a jake brake."
We talked for a few minutes and he ended up saying..."see if you can find a quieter muffler"
no ticket.
I still have that one on...it only does the loud noise when lifting from high revs.