Spark plug cost, huge difference

[VH5150]

Ref Plug NGK IZFR6J

Why is there a big price difference ? Rock Auto sells the each plug for $9.74 . Other places are selling that plug up to $29.00 each? Am I missing something?

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[SeanH]

Not sure....but just bought some....

Thanks.....

[smoken86]

People buy them for 29 each because they like to waste money. I won't buy them off sites like Amazon but never had a issue with Rock Auto.

[JOE54]

heard there are some knock off /copies out there

[Aj14]

heard there are some knock off /copies out there

Most here are aware of that.
So can Rock Auto be trusted?

[mudron08]

I have purchased many things from rock auto, never had an issue, however I never purchased spark plugs. After seeing how cheap they are, I am inclined to think about purchasing a few to try.

[billnorman1]

I haven't bought those exact plugs. Be wary of everybody, especially Amazon, and I do a lot of business with Amazon. I think I'd trust Rock Auto, I never got a bad part from them.

[Double Trouble]

I have been buying from Rock Auto for years never had a problem NGK plugs for my Optimax are $9 and change and they are genuine not fakes.

[EuropeanAM]

If they are genuine NGK Spark plugs, there is only ONE other difference: The WARRANTY (What it covers, who covers it, and how it's administered).

And yes: I've seen a porcelain come apart in an engine due to a defective plug more than once.

That's a slamming-cheap price on those plugs, no doubt.

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