Re: Best spark plugs for a 4.0 SOHC are...
I used the Autolite iridium plugs and after 12k miles no worries.
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2004 super cab, 4 door xlt with appearance package and 4.0 cammer V-6 with auto trans and 2wd fitted with a Leer topper. Sounds via Alpine head unit and power pack through infinity Kappa components front and Kappas rear.
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