just installed yesterday.. I got the QQ baffles and they rock!!! tuned the bike today and the performance gains are unreal!

 

as others have said the sound is great. with earplugs still couldn't hear after long rides. save some $$ and build your own directions on nightrider. i made a set for my sportbike and then put them on my hd. if you want i can advise how to make them about $10 and no fabrication necessary.

http://www.nightrider.com/biketech/exhaust.htm

 

got em on my 06 Bob...sound great. I may have lost a tad bit of low end torque..but gained a bit on the upper end. I use them in the old style SE2's......

 

A lollypop does not come close to the monster baffle. Certainly not in my particular case anyways.