Thread: NGK Plugs
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Old 09-15-2020, 12:14 AM   #15
Aarongriffey
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Join Date: Feb 2020
Location: Hayward,CA
Posts: 513
Default Re: NGK Plugs

The gold color on the threads is something sprayed on to help keep the plugs from sticking to the head so you can never strip the threads when removing the plugs. They break loose easier that way.
I just started using NGK plugs in 1972.
I installed NGK plugs in my F1 in 2006 and again in 2016.
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