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Old 06-14-2005, 12:10 AM   #1
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NGK Iridium IX spark plugs: is this a better upgrade spark plug for my 1993 SSEI bonneville supercharger?
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Old 06-14-2005, 12:12 AM   #2
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Never heard of anything bad about the irridiums myself except for the price of them. My recommendation is to get one range colder and gap them a lil smaller if you are gonna pulley down.
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