I have them on my 996. I was not happy with the quality of the welds on the mid pipe and wound up having to clean that up. The bigest problem was that they leaked at the front where the carbon fibre tube mates to the oval piece that the pipe is welded to. The leak could be felt from about ten inches from the side of the exhaust on both sides of the bike. They were taken apart and sealed and it is not a problem now. This may not be common as they are the only set that I have any experience with. The fit was good. The finish does not look like the photos on their web site. They are not smooth and shiney in real life. They do sound great though and I am happy with them at this point. I do have a new set of Termi's at Section 8 for the next time I destroy an exhaust. It is practically impossible to get Sil parts in the States though. I had to buy the mid pipe and the only place I could get it from was in Germany. Major pain in the ball$. My recommendation is to get the Termi system and save yourself some money in the long run.
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