I have used the wrapped baffle on two bikes. I notice on a stock or near stock (stage 1) bike, the pipes are very quiet. Soon as you do some mods with cams and compression, the sound level goes up several times what it was as stock. The engine mods have more to do with the sound than the baffle....... My bike now has the new 259 cam and the high compression pistons with the wrapped baffle. It is very loud. Much louder than my buddys bike with no engine work done.