Review on ACDelco 9444J Professional Spark Plug by Darryl Pendall

So far, so good! I had occasional dropouts. The car jerked at the traffic light. Last week it got a lot worse. I don't think I shot twice. Looking under the hood I heard a coil clicking, it looks like a spark is thrown at the valve cover and not the spark plug. For $20 (for coils) and $23 for a new cord set. The machine runs quietly and has more power. I assume that the mileage will also improve. Not bad for $45!