that is the peace i need the carb slides in to it and when u turn ur lock pin that holds the carb tight so no extra air can get around the bottom of the carb and the peace is missen a chunk and i ? the lhs and they said the only way waz to do what i did pry that out then pop the pin and bore the hole enough to let the pin slip but not to make it were it would be to loose i got all that done but with out that barrel im sol