Thread: Spark plugs
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Old 11-22-2014, 11:16 AM   #2
FED 387
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Default Re: Spark plugs
Champion---they produce a tad more HP than the Autolites (dyno proven)- Changing frequency depends on the situation-FED 387
Last edited by FED 387; 11-22-2014 at 11:17 AM. Reason: add additional info
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