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Your best bet for plug replacement is what the factory recommends. Multiple electrode plugs are worthless, although if that's what the factory calls for (some VW and Audi are this way), then go ahead. Either way, I'd buy a OE plug. Meaning, your Nissan would get Nissan part numbered plugs. My GM's get AC plugs usually, although this last time around, I threw NGK's in the Pontiac.
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Generally speaking, if you were to get what you really deserve, you might be unpleasantly surprised.
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