Denso Iridium Long Life spark plugs utilize a special Iridium alloy to create one of the longest lasting and most durable plugs on the market. The alloy allows for the smallest electrode to date to be used in each plug, measuring only 0.7mm, to drastically improve ignitability. A 360° laser weld holds the electrode tip in place to further increase durability and plug life. These and other improvements over previous designs lead to spark plugs that are durable enough to withstand todays high performance engines. Sold individually, 6 required per car.
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