Hi, I picked up a 2015 1090rr a month ago , I am finding it hard to find parts for it . As with any stock bike there are some parts on it that have to go away , because they are annoying . The cat is one of them , I don't really care about getting better performance,"if I was I would just ride the 1098s instead" The thing makes a lot of heat . it makes enough heat that I keep smelling my boot sole burning. what years and model pipes fit this thing ? does a f4 header fit ? I got a tig welder I cam make things happen , but the stock pipe that is on here looks like a bad starting point . it has ugly collectors and is in plain view