louder

I was riding in to work yesterday and the bike suddenly got louder as I was pulling into the parking lot. On the way home it still seemed louder than usual and my wife commented when I pulled in that the bike sounded funny. It was nice to know I wasn't imagining it. I bought my RC390 in...

i'm wondering if there's a way to preserve the look of the stock exhaust but make it louder. not offensively loud, but just louder:confused: