I had the Vance & Hines S4 titanium slipon on my 2001 9R for about 1000 miles. It is a good pipe. Fit and finish are above standard, sound is good, and the butt dyno measured a little performance increase. I only took it off to put on a full Akra system. Incidentally, I still have the V&H pipe and would entertain any offers. Hope this helps.