there are two silver studs that hold the bumper on, on the back of the nozzle. removal is easy. putting it back on is a pain in the a$$. you have to stretch the slit over the circular stud and it takes quite a bit of effort to get the both on. but once you do, putting the rest of the bumper on isnt as hard. make sure you reattach both ends FIRST, then stretch the bumper around the front of the nozzle, or your kill yourself twice instead of just once.
Will