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Hostil

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Ive been buying my NGK 6510's from Rock Auto.com , $48.24 for a full set plus shipping, seem to be the real deal.
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DougS550

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WildHorse

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So 6509 cover a multitude of cars/trucks, and I think 6510 is Cadillac only ?
Interesting that Cadillac uses a 1-step colder plug.
 

ice445

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Ive been buying my NGK 6510's from Rock Auto.com , $48.24 for a full set plus shipping, seem to be the real deal.
I had a scare last time from rockauto even. Got some iridium for my Gf's camry and the metal of the plugs was zinc plated and not the purple-y nickel coating they usually have. I now only use sparkplugs.com which is basically NGK's north American distributor.
 
 








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