Re: Yet Another Spark Plug Question
E3 is not an upgrade in my opinion, other than in price and hype. Nothing to be gained with them, regardless of the marketing claims. Just buy the recommended copper plugs and gap them at .045" for your HEI. I prefer AC plugs but have run others -- the only ones that gave me problems were Champions.
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- Mike -
1972 K20 LWB 350/350/205
RIP El Jay
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