Hey guys, just wondering, is the vtv valve required? if so, where can I buy one? I'm guessing it helps gas mileage or something to do with vacuum, I'm stumped on this one, even after searching. If required, where can I get one, and by Vtv valve I mean the round valve coming off of the dashpot. Thanks ahead guys, I'll get a pic in the morning if you don't know what im talking about. Later guys.