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The iridiums are good plugs. They are good both from a performance and longevity standpoint. As good as copper and platinum in those respective categories. IMO still not worth it. I have always prefered copper and changing them once a year.
copper-performance
platinum-longevity
iridium-performance and longevity
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05 Deep Water Blue KC SE
Rockford pop package w/ buckets, Traction package, Utilitrac w/ bed extender, Banks exhuast, Volant V3
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