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00 XJR spark plugs-replacements?

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Old 07-27-2013, 10:53 PM
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Default 00 XJR spark plugs-replacements?
Given the variety of replacement plugs available in '13- any consensus on what to run in my 00 XJR? Thread review not particularly germane.
 
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Old 07-28-2013, 12:59 AM
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I'm running one step colder Denso U-Groove per advice from Kenne Bell. Their web site says for some reason these lasted longer and performed better than the iridiums.

This is a good quick read:
http://kennebell.net/KBWebsite/Commo...SPARKPLUGS.pdf
 
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Old 07-28-2013, 07:44 AM
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NGK Iridiums here.
 
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Old 08-01-2013, 04:48 PM
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Ngk iridium
 
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Old 08-02-2013, 02:54 PM
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NGK IFR5N-10 (The 10 being the gap, of 1mm)

BTW kenne bell quote twinscrew supercharger equipped engines. Jaguar Eaton engines require NGK Iridium.
 
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Old 08-02-2013, 08:00 PM
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Originally Posted by Sean B
NGK IFR5N-10 (The 10 being the gap, of 1mm)

BTW kenne bell quote twinscrew supercharger equipped engines. Jaguar Eaton engines require NGK Iridium.
When I talked to them on the phone they gave me the Denso U-groove part # for my Eaton at 15 psi and suggested the one step colder U-grooves.
 
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