Yeah that was one of the last mods I did on my FZ6-R. A lot of people say you need to bend the headers because it hits the oil pan, and yeah it does hit the oil pan. I didn't have the resources to find someone to bend it for me so I left it on there for the time being and didn't have a problem with it. I had a juicebox for it yes. You need to get a fuel management device because you're going to be running lean because you're letting more air in and not enough fuel.