new exaust.

Do you have full exhaust out the back? Tailpipes? If not, that'd be my first step. If that's still not enough, consider using a pair of glasspacks as resonators. I've heard that has toned down an overly loud exhaust. I'm not bashing yours, what's obnoxious to one person, is music to someone elses ears! :) For the record, I prefer LOUD!