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Plugs for 186 heads / H.E.I.

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03-20-2021, 12:04 PM	#1
Dan-K Registered User Join Date: Aug 2009 Location: Ft.Collins, Co. Posts: 104	Plugs for 186 heads / H.E.I. Recently rebuilt my 350 . I put on a set of 186 heads and flat top pistons . I am running an H.E.I. . What would the recommended plugs be ? R45TS or do I need a plug that has the metal gasket ring ? My builder put in NGK BR6S plugs. I know that NGK makes good plugs but Just interested in others opinions .

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