- - Denso Nickel U-Groove Series
- - Nickel Alloy Ground & Center Electrode
Set of 4 Denso Nickel Spark Plugs
Denso's Original U-Groove Design Nickel Spark Plug Features - U-Groove Ground Electrode - Copper core center electrode for superior thermal conductivity Even DENSO's "standard" spark plug is something special. The innovative design that helped to make DENSO spark plugs famous, the U-Groove plug employs a unique, channeled ground electrode designed to generate a larger spark nucleus at the point of ignition. Greater spark energy than ordinary plugs means improved flame travel, producing more complete, consistent, and efficient combustion.
Reference: ZPN-75644