Question about ngk tr55 sparkplugs
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From: Brady TX
Question about ngk tr55 sparkplugs I bought another set of ngk tr55 since the last ones have about 10k and I already had the old ones out from doing the head and cam swap. Anyway my question is 5 of the plugs I got are a goldish color on the threads and where the socket goes. The other 3 are silver. The plugs have the same part numbers on the boxes and the same on the plugs themselves. Can anyone tell me what is up with that?
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Originally Posted by 99ss00ws6
I bought another set of ngk tr55 since the last ones have about 10k and I already had the old ones out from doing the head and cam swap. Anyway my question is 5 of the plugs I got are a goldish color on the threads and where the socket goes. The other 3 are silver. The plugs have the same part numbers on the boxes and the same on the plugs themselves. Can anyone tell me what is up with that?
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