Are the stock spark plugs from ACDelco, Iridium or Copper? I noticed you guys said go with Autolite 606 Iridiums, or the $7 stock ACDelco plugs... but copper ACDelco plugs arent $7????
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04-18-2012
Are the stock spark plugs from ACDelco, Iridium or Copper? I noticed you guys said go with Autolite 606 Iridiums, or the $7 stock ACDelco plugs... but copper ACDelco plugs arent $7????
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