Chis on the NGK, the stock replacement iridium is the TR55IX.
Although you are not supposed to gap iridium plugs here is a how-to for those like me who can't leave good enough alone. Installation Guide: DENSO Iridium
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Chis on the NGK, the stock replacement iridium is the TR55IX.
Although you are not supposed to gap iridium plugs here is a how-to for those like me who can't leave good enough alone. Installation Guide: DENSO Iridium
Last edited by IndeedSS; 01-11-2008 at 08:55 PM. Reason: added a link for iridium gapping
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