No, the neck is smaller OD than the 2.5. I only know of a couple alloy ones that fit the 2.5/3.3 engine, both are OS carbs, neither were/are cheap. One I can't remember the model, the other is for the 21TM/18TM/18TZ. OS 11K, the 11K-R was for the revo, only difference is the arm for the carb...