Sure. Go to gixxer.com search yoshimura. NUMEROUS threads where people are showing off their new exhaust and you always have those stating how much they suck and (insert your favorite exhaust here) and why they feel it's better. Hell just last night I was reading a thread title " is yoshimura still the best exhaust". Read that and you might get your answer.
All I'm asking for is Numbers. What's the favorite saying on this board again? Proof or it didn't happen?