Just fitted a Delkevic carbon fibre exhaust to my XSR. Must say, really pleased with the quality. All the pipes are single piece, no welding of part bends to short straights. Finish is excellent and the pipe really suits the bike. Only point to note would be it is really loud. I went for the 350mm can which is supposed to be a bit quieter. All I can say is it is MUCH louder than stock. The tone is meaty. The bike sounds really angry, all the time, but in a good way. I would say if you're going to go with one of these to get the longer cans, unless you want super loud!! Recommended.