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Spark Plug Protrusion into Head?
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11-14-2019, 01:23 PM
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100
flatjack9
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Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,527
Re: Spark Plug Protrusion into Head?
The 425 refers to the relative depth of the cylinder head. The larger number can take a higher lift cam.
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