I removed the stock shifter boot and put it on my Pro 5.0. It definitely cut down on the noise coming from the shifter, but I think that the rubber can sometimes get in between the handle and the stop bolt. This seems to happen sometimes when you shift into third gear. It still engages and drives normally, but seems to vibrate more than normal. Not sure if you can just reposition it, or cut some of it out, but I had heard of Toofastforu doing this to his Steeda Triax and thought I'd try it on my Pro 5.0. I removed it for now, maybe later I'll play with a little more. Do any of you with the Triax feel this extra vibration in third gear if you use the stock shifter boot?