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NGK Iridium BR9EIX

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I was just curious about anyone's opinion on the Iridium Spark Plugs from NGK.

Indicate whether you use them in a stock or mod application AND model of sled.
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I tried them for only about a hundred miles or so. They seem to run a little hotter, but part of that could be the premixed fuel making the eya's look a little darker/rich. Hard to tell any real major differences on the trail though. I run an F7 snopro.
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