Yeah if you want quiet, stock is the way to go. I have a Vance and Hines Pro Pipe on my Spirit. It's quite loud, not obnoxious though. Nice deep sound too. I did recently install a Smart Partz quiet baffle in it and that cut the sound down quiet a bit but now it's not nearly as deep sounding. Still I feel better about leaving for work at 530am on it now.
2002 Shadow Spirit 1100