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Excuse me for asking but where does the second plug end up in the combustion chamber? I guess off to one side of the valves, coming in from the bottom. I understand the advantage on a two valve motor (see this years two valve Ducati's) but wonder how much it will help on a four valve head. Four valve heads usually have a centrally located plug in the center of the four valves. Will it cure the low RPM "knock" that strikes my motor sometimes? OK you "rocket scientists" out there, explain further please. Thanks in advance.
Harold
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