Thread: NGK Spark Plugs
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Old 09-21-2008, 11:00 PM
Unreal Unreal is offline
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Default Re: NGK Spark Plugs
Just called Advanced, and they listed the GR5 for an L72, and have them in stock. Since I dropped my compression to 9.75 to run on pump gas, do I need to go to one range hotter? Would that be GR4?
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