I have a 2005 Honda Shadow vlx 600. I drilled the baffles out and it is the best thing I did to the bike yet. All you need is a 1-3\\4 metal hole saw bit(cost about $12.00). I gained about 3 miles to the gallon and feels like I got a little bit of horse power. You donĀ“t have to get a jet kit for it. It sounds better than just about any exhaust I have heard. Its not to loud but people will know your around. If anybody is wanting to take there baffles out I strongly recomend it.