I read about people needing earplugs while riding after they change the exhaust. I want to change it for looks and sound, but not to the extreme that I would feel the need for earplugs. Does anyone know what the decibel level differences from the stock to aftermarket exhausts are? I like the longer can look from the Graves. I would search out someone near me with the another FZ 09 to compare, but it seems that I'm the only one in my immediate area that owns one.