My 2004 Fx35 needs spark plugs, what are the best ones to install that will give the best performance, I hear iridium plugs are pretty good, autozone says NGK plugs are oem, please advise and thank you
No plug is going to give better performance. Your car will just run better since new plugs > old plugs. Either Denso or NGK Iridiums are fine, Denso is a little cheaper. I'm running Denso's right now and they're fine. I've run NGK Iridium's in the past and they're fine.
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