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Discussion Starter #1
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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What is the difference between the BR9EYA and BR9EIX? Guess I will go check NGK's website.
 

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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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