D, I felt the same way you did , I also thought the Cobras were lighter then I weighed them. Stock were 21 LBS Cobra were 30LBS. I was surprised. I also tested them with and without baffles and either way the bike would hit the speed limiter faster with the stock mufflers. But I don't really need to run 126 very often and I love the way the Cobras look from the rear, I get many compliments on them. As I posted before I ended wrapping the baffles with fiberglass and I really like the sound of them now without being to loud. Sound is very subjective, everyone is different.
Jakec