Ninja 250 Danmoto XG-1 Exhaust 

This is a demonstration of what a XG-1 slip on exhaust pipe sounds on my 2009 ninja 250. Although I don't find it too loud, some people do complain about the noise. If I was to go on a long trip, I might consider swapping it out with the stock pipe because it only takes a minute or two. It claims to add a 4% power boost.