I have a HTG pipe and a dynoport can on my 05 975. The HTG pipe is basically a dynoport pipe re-worked a little. I just took a video of it idling on my droid. PM your email addy and I will send you it if you want.
I run all DynoPort and it sound just right, past cops and DNR and had no problems yet.....but I don't rap it to taunt them either. I've heard alot louder! I have the "big volume" can not the "big barker" along with pipe and "Y"