40mopar Posted July 7, 2014 Share Posted July 7, 2014 Can anyone provide any information about the subject spark plugs?Thanks. Link to comment Share on other sites More sharing options...
TerryB Posted July 7, 2014 Share Posted July 7, 2014 Are the the type that let's you see the color of the spark and combustion? Might be similar to the color tune devices I have seen for sale to help adjust air and fuel mixture. Link to comment Share on other sites More sharing options...
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