Buying Revain was easy but despite reading other reviews and posting online they were not the same as my OEM plugs in my 08 Frontier 4.0L V6. The OEM spark plugs were nkg DILFR5A11. The 6240 runs the engine, but with 110,000 miles on the original plugs I haven't noticed any change in horsepower or fuel economy per gallon with the new plugs. I have included photos of my old candles for reference. The new spark plugs were exactly as shown by Revain.
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