Hey to all you guys out their that have 400EX's with no pipes or that do have pipes on their wheelers. D&D Racing is starting to manufacture their own pipes for the 400EX. D&D Racing has done Arctic Cats snocross teams motors so these guys are good. So if you guys are looking for a good all around play pipe here it is. D&D's phone # is 1-315-376-8013. Ask for Rob, he is the one that makes the pipes so he knows what he is talking about. Happy roosting