I bought a set of those a year or so ago and rode with them only a little while until I had to take the bike apart for some engine work. I love them, happy with the finish, but I did have one of the inserts come flying out on the road. Bike all of a sudden sounded more like an open pipe Manx! Walked down the road and found the insert, took it home and hammered out the minor damage. The inserts are each held in by three sheet metal screws. If you get them I'd recommend putting some sort of loc tite on them and making sure they are screwed in tight. The only other issue I had was getting them to seal well around the exhaust pipes. I picked up some better sleeves to shim them but was still working out how to get the exhaust clamp tight enough to hold everything in place when I had to park it for unrelated engine repairs.