I have a 2007 ninja 650r. I am looking for a nice loud exghaust so I will be heard by motorists?

Note: I want to be heard not be an jerk, but so that other motorist are more aware of me on the road. Most cars don't look for or notice motorcyclists on the road. I figure if they hear an obnoxious noise they will look for whats causing it before i even get close to thier vehicle.