AC Delco Spark Plug 41-110 and 41-162 Differences?

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gooffeyguy
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I think it was closer to 1/8”.

Does anyone have an idea when the part number was changed? I just pulled a set of 41-110 plugs out of thecopcar, but don’t know the age of them.
Mine had 41-110 in it when I changed them in 2019. I replaced them with 41-110, so they were still available in 2019. I'm guessing the numbers changed in late '19 early '20

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exp500

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Ha! That’s okay. She bit me enough already.
Your truck requires a blood sacrifice too? Glad I'm not alone!
Wondering if the number change is from switch to NGK manufacture?
 

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