Which model NGK
<strong>I will have mac headers and a few other bolt ons. What temp should i use in the ngk line?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Tr55 I beleive is the number I think.If you ever want to spray then tr6's are the ones to use.Anyones but the colder ones and you will be fine.
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