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NGK Iridium Plugs

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Old 08-26-2001, 07:08 AM
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Default NGK Iridium Plugs
Does anyone know what the part number is for a NGK Iridium replacement spark plug. I have found the Denso iridium to be a IR22 or IR24 but have had no luck on the NGK PN?

Dean
Yellow 01'
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Old 08-26-2001, 01:09 PM
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NGK does not make a irridium plug for our heat range yet, only Denso right now
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Old 08-26-2001, 06:47 PM
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What he said.......
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Old 08-27-2001, 02:34 AM
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Thanks for the response
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Old 08-27-2001, 03:28 AM
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[QUOTE]Originally posted by REVN S2K
[B]Does anyone know what the part number is for a NGK Iridium replacement spark plug.
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Old 08-27-2001, 09:12 AM
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How long are they supposed to be good for? I put a set in a few k miles ago and forgot to make a note of when I should change them.
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Old 08-27-2001, 09:18 AM
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Originally posted by tpn
NGK does not make a irridium plug for our heat range yet, only Denso right now
That's not true. I am now using NGK iriway no.8 spark plug on my
S2000 right now. You can check those spark plug on the NGK website.
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Old 08-27-2001, 09:20 AM
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FYI:

IK22= 7 (heat range) in NGK
IK24= 8
IK27= 9

I have used 22 and 24 for street but only use the 27 for road racing.
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Old 08-28-2001, 06:56 AM
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Originally posted by wileecoyote


That's not true. I am now using NGK iriway no.8 spark plug on my
S2000 right now. You can check those spark plug on the NGK website.
Funny.......Emailed NGK back in June and they told me that they would not have one till next year for our engines.

But I guess you have found one that is acceptable for our heat range and performance now. Thats cool.

Change interval...don't really know for sure, but I would pull them out at least yearly to inspect them, or if you have performance issues.
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Old 08-28-2001, 02:32 PM
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Can anyone post the full part number for the NGK Iridium plug that they are using?

Thanks for the info so far.
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