Average Reviews:
(More customer reviews)I was not aware that this model of NGK Iridium plugs is only Iridium on the tip and not on the ground electrode. And I didn't know when I bought it that would matter. My 2001 Grand AM V6 3400 engine uses GM's Waste Spark system. Which is a dual firing ignition so the 2nd spark burns excess fuel for better efficiency. Other brands and models have similar systems. When the 2nd spark ignites from the opposite direction which causes wear to the ground electrode. Which means this plug will work, but the poor 2nd spark can cause very minor idle inconsistencies that you likely won't notice unless you know what to listen for. But overall it will wear out the plugs much faster which defeats the point of Iridium in the first place. So if you have a dual firing spark system, spend the money and get either Double Platinums or Double Iridium plugs. I ended up getting the OEM AC Delco Pro plugs for my Grand Am which are a Double Platinum 100,000 mile plug. And those work great in my car. Unfortunately I can't return plugs I installed. lol. So make sure you know if you are ok with only the tip being Iridium or if you need both the tip and ground to be the same coating. That is the only reason for the 3/5 stars. The listing on Amazon and even at NGK was not very upfront with mentioning that not the whole coating is Iridium. Which is what I thought I was getting. I am sure these are 5/5 star plugs for single spark systems.
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NGK Iridium IX Spark Plug is designed to offer extreme ignitability, improved throttle response and superior anti fouling capacity. It is constructed from durable material that is corrosion and abrasion resistant. This spark plug features a fine iridium tip that ensures high durability. It ensures longevity and can easily be installed.
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