HAHAHAHA ^^^^^^^ What @Abbz8377 said...but I love the way it drives. And I found mine, its on the heatshield in the back by the muffler where the last two hangers are. They bang up against the shield hanging down under the bumper....like you said in the rain and other real random times but nothing too terrible
Glad you found it I'm ok with loud but like does it sound like crap?
I have a 14 si. It's the little screws that stick down from the heat shield. Mine only does it when it rains and the hangers get wet and wiggles easier