Thread: spark plug type
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Old 09-10-2010, 02:03 AM
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rich970
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Join Date: Aug 2005
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Default spark plug type

i have 440-1 indy heads 15to 1 comp flat top pistons. i was wondering can i use a extended tip plug. i use ngk R5671A-9 was wanting to try a R5672 Series plug. Thanks
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