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Inconel , AKA nichrome and a few other very similar alloys, are what plugs have always been made of ( at least since the 50's). I have removed 16 manufacturers original platinum plugs with 100,000 miles . All looked perfect , I hated to throw them away . New replacement platinum plugs made no difference in performance or mileage. I don't know why one ...


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I've been using dg1h10 pulstar plasmacore over two years now on my Infiniti FX35 with 206000 mile on it and don't have any problems,I've experienced more power on my engine and best gas consumption, for what I experienced I surely recommend these plugs


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Any zinc coating is a serious NO ( liquid metal -steel- embrittlement risk of stressed component like a bolt). The exhaust components can get pretty hot . Any standard steel bolting ( eg.chrome moly ) is going to start relaxing at 800 F, I think design temperatures are well above that. [relaxing comes at lower temperature than creeping]. I expect they are ...


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