It's a relatively cheap and very easy mod, so why not?! - that's what I figure. I will be getting one soon too. They seem to have the same effect as on a car - deeper sound. Personally, I think they are not worth while on a non-high performance vehicle because then it just makes them sound stupid. With an FZ6, they will add a little character. I have used a different bike, and to be honest, I didn't feel any performance difference. But as a user has stated, he got a bit better mileage which is well worth it then!