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Discussion Starter #1
After reading up on spark plugs on the forum I see the E3's are a bad choice. Vehicle has 70k and probably the original plugs. 5.7L engine 2006 model. I am leaning towards OEM plug but would like to hear what you guys would advise. Thanks.
 

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The OEM Champions are the best plugs to use in the 5.7.
 

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All 16 OEM Champions copper
 
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