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Review on Denso 3426 Spark Plug by Charles You

September 12, 2022

Improvement in engine performance and significant increase in mileage!

Denso 3426 FK20HR-11 Iridium Long Life spark plug was the same as the original equipment fitted to my 2007 Toyota Camry SE V6. I replaced all six as I had zero miles and the engine seemed sluggish. I saw a 50+ mile increase on my first tank and that mileage has been maintained. Engine performance has also improved significantly.

Pros

Comfortable to use

Cons

So-so

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