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.