Quote:
Originally Posted by mainbearing
I have never seen a spark plug with a copper washer like that. And in the States, NGK does not make one like that for the 335i.
I wonder if that is a counterfeit plug, especially if it was giving you ignition related problems.
Do the other 5 plugs look the same? I would get new ones from a reliable source.
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Yes, these are the 2 step colder plugs. They were acquired from aa legit source.
My cause for ignition problems was a micro fracture leak on my VC.
https://burgertuning.com/products/ng...der-spark-plug