yes I know all the common discussions, but the one I am talking about was a GM tech bulletin. (people talking about something in a forum doesn't quite hold as much water as an official tech bulletin, or a scientific treatise) I do know that I have no problems with fouling plugs or sluggish acceleration, or any of the ailments usually attributed to a non heated installation. In my particular case it happens to be a fact, your experiences may vary. I have planned to put heat on it for quite some time now, But it runs so good, I see no reason to fester with it. However once I put the aluminum dual intake on that may change.