i've seen a hand full of them up in Sturgis. they are freakin huge. i wouldn't want to add another 45lbs to my exhaust, and they don't really look that cool in person. when i 1st heard of them i thought of putting a couple on my chopper, til i saw one up close. it was like putting a 3' chunk of 6" pipe on for a muffler thingy.
forgit it! looks like junk to me.