New New vs NOS Spark Plugs

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Terlingueno

Fictional Western Sage
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Location
Far West Texas
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Skeeter
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1985
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K20 Suburban
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350/SM465
I found a set of NOS AC R45TS plugs stamped " AC FLINT MICH MADE IN USA" with the 4 green stripes. I compared these with the "bought within the last two months 'Made in China' set I had on hand. Notice the difference?

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