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Old Feb 8, 2003 | 01:13 PM
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Default Spark Plugs

What kind of spak plugs are the best for a 98 Z28. Ate the AC Delco's better than the NGK. Whats the difference between the 55's and 6's that NGK has.
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Old Feb 8, 2003 | 04:24 PM
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Default Re: Spark Plugs

55's for NA use and 6's for spray. The 6's are a COLDER plug which makes them more nitrous friendly
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