After installing a Jardine pipe on my Buell, I was reluctant to let 'er rip because, even though the pipe had a nice sound, the volume was stretching the bounds of social decency. Installation of the quiet insert was easy and the exhaust volume was reduced to below the "challenging authority" level. The exhaust tone is still rich and full. I immersed the insert in ice prior to installation so it tapped right in and was easy yo align the set-screw hole.
Made a huge difference on my buell. Sometimes I leave early in the morning.I guess what I am saying is this purchase was more for my neighbors then me so maybe they should be writing the review? They haven't complained about bike noise and I did not silicone/loc-tight it in so it is easily removable. I should mention it is important to secure it tightly as I have heard of people loosing these things (Safety wire!)