Relatively recent advances in fabrication techniques have enabled the use of Iridium
an incredibly hard precious metal, for the construction of spark plug electrodes.
Laser technology is used to weld the Iridium tip to spark plugs manufactured by NGK.
It's worth noting that spark plugs can't increase the potential power that an engine can generate but a more efficient spark will provide more efficient combustion and associated performance and economy benefits.
A poor spark from a worn or low grade spark plug will reduce efficiency.
An Iridium plug will produce a more efficient spark.
Notable properties of Iridium are its melting point - approximately 2450 degrees C,
considerably higher than Platinum, and it's strength - approximately 8 times that of platinum.
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