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I think those boxes are counterfeit, they’re not baby blue*Edit:
The purpose of this thread is to give a basis of comparison for others.
Bought through Holden, I can only assume the security of their supply chain is assurance enough that these are the real deal.
I’m not posting to compare costs at all. Yes they cost me a bit, but if that’s what it takes to be assured they aren’t fake, then that’s what it costs.
What AC Delco say:
Counterfeit parts have found their way into mainstream outlets in the past. Fakes are becoming very good and it’s now at the point that to really tell, they have to be cut down the centre to reveal the cross section.
This is also true of NGK and Champion, as well as other major manufacturers.
So to further the topic of counterfeit spark plugs and the difficulty in identifying genuine from the knockoff, here are my AC Delco Irridium spark plugs for my LS1. These were purchased through Allan Mance online store.
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First the box.
(Barcode is for pack of 4)
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Of note, the cut, the silver line, the barcode, the letter placement and the date of trade mark registration.