Is anyone running a supertrapp low roller on there softail? How's back pressure with open end cap? Are they loud? Are they comparable to a thunderheader? Here's a video http://www.youtube.com/watch?v=Mu-gEMFWRZY

 

If you want LOUD I don't really think Supertrapp is the way to go. They are great "quiet" pipes and make great power, but my guess is removing the endcap will cuase a loss of power. You can however drill more holes in it or make a new one as a buddy of mid did to get more power. Supertrapp pipes are great in general. But, if you are looking for the sound of a thudnerheader you should get a thudnerheader as it is unique.

Drew