3. I've read and heard the yoshimura loses some power in the lower rpm range (apart from taking off from a set of lights i ride it quite sedately, mostly between 2.5 - 4k rpm) 4. I've heard some mixed ratings about carbon exhausts in terms of lifespan and upkeep which is why I'm looking at the stainless yoshimura. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.