Yet Another Spark Plug Question

[trac209]

Originally Posted by Stocker

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.

Champions are made by AC delco. I've run champions in everything because here nobody but the dealer sells AC delco branded plugs and they are just fine.