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Old 02-01-2016, 11:07 PM   #7
Grumpy old man
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Join Date: Dec 2013
Location: Gods country East,Tn
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Re: Yet Another Spark Plug Question

Sparkplugs will only give back what the installer gives them ...INDEXING.. other than that you could run 8 different brands of the same heat range and not see a difference .
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