I have a full Curtis Sparks X6 exhaust for a Honda 400ex that I would like to trade for a set of Front Honda 450r stock shocks. I acquired the exhaust in a purchase of a crf100 for my son (simple to explain if needed). I have not mounted the exhaust but do know it has no spark arrestor or quiet insert. I ride with the family on public land in California so the pipe I would need to get needs to be forest approved (spark arrested) and be at or under 96 db. feel free to mail me if you would like to discuss a trade... Thanks b_oconnell@sbcglobal.net