I'm still trying to figure out how a head falls off flow but put an intake on it and it evens itself out. Then why don't they flow the head with the intake on? Maybe they do. If that is true then the air filter and carb need to be on also right? I love this like of reading. Makes me think I know something even though it just shows me how stupid I am because it confuse's me even more then I was before I read it.