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NEW Yttrium Nitrode Spark Plugs are the most technologically advanced plugs made today. This design will not only give you a more consistent burn but it will also make more power, torque and provide better fuel economy. The dual center electrode not only provides a better spark but now you get double the ignitability in the combustion chamber. The end result is an increase in performance with improved throttle response, greater fuel efficiency and reduced emissions.