Thread: Spark plugs
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Old 11-23-2014, 12:31 PM   #15
jcw31
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Default Re: Spark plugs
Alan. Dont you you think that is a warm heat range for any high rpm/compression motor. Ive seen some high end s/ss builders using a cold as ar3932/c59c on 396/325 combos in stock?

Joe
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