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Old 02-01-2016, 09:51 PM   #2
Stocker
20' Daredevil (Ret)
 
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Join Date: May 2003
Location: Jefferson State
Posts: 13,810
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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1972 K20 LWB 350/350/205

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