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BOSCH 7405 Copper with Nickel Spark Plug - Single
Heavy-duty nickel center electrode ensures longer life than standard copper plugs
Copper core provides better heat transfer for resistance to pre-ignition and fouling
Metal glass fused resistor maximizes interference suppression
Ribbed insulator design prevents misfire due to current leakage
Nickel-plated rolled threads provide superior resistance to corrosion and do not require anti-seize
Platinum Multi-Ground Plug unique firing technology combines the advantages of surface air gap technology and 4 yttrium enhanced ground electrodes.  The 4 ground electrode design not only provides multiple radial spark paths but also the surface air gap design create optimal plug life.