Received a loud exhaust ticket last night. I wonder why

Anyway I was going up a pretty steep hill in 3rd gear at 4k rpms for a decent amount of time. The bubba wasn't a being a a-hole, he let me slide for tinted rear license plate. I told him what makes you think I can afford to pay tickets if I can't afford to get a brand name exhaust system (I have straight pipes). Gave him a chuckle, regardless I knew this was going to happen sooner or later. This ticket doesn't mean I'm going o install the res or muffler again, its staying how it is lol.
can't embed the video so heres a youtube clip:
http://youtu.be/PreBCkbElZQ