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yes,i watched that video last week and read on ngk site heat range was read on ground strap. so I called ngk and talked to one of their techs and he tells me timing is read off the ground strap. so,go figure.

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Exactly..........too many opinions on this according 2 who you talk 2.............

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true but can you explain how timing can affect the strap?

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I can`t explain crap................