As suggested, you'll probably want to get a good earpiece and portable stereo system. Unless you are crawling around at sub-2000 rpm, you probably won't hear it anyhow. Or if you do, it'll be so loud, you'll sound like one of those kids with a $5000 stereo in a $1500 Civic.
My speakers are right between the seats, and I can only hear it at slow cruise speeds.
Steve