I need to know what part i beed to connect the stock head pipe to the silencer or do I cut the end off my stock silencer and fit it together that way? Seems like to me a flange is missing. Pro Circuit could have spent a little time putting a diagram in the box for freakin $600.00 out the door. I should have got the Muzzy I hear people talking about. I don't know but after the jet kit and the pipe exhaust leak fixed the only mods this quad is getting is some wheels that will hold up to some river rocks and washes.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,Ye ah RIGHT! Whatever Im haired out again.