Ignition & Electrical: Denso (4013) W14FP-U Traditional Spark Plug, Pack of 1

Denso (4013) W14FP-U Traditional Spark Plug, Pack of 1 Reviews

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Denso (4013) W14FP-U Traditional Spark Plug, Pack of 1 Feature

Denso # 4013
Denso Traditional Nickel Spark Plug
U-Groove Ground Electrode

Denso's standard plugs have always offered a patented U-groove ground electrode producing for a larger, hotter spark. Copper core for better thermal conductivity. Machine rolled threads to reduce cross-threading and seizing . The plug insulator is constructed of purified alumina powder for extreme stress with 5 ribs to prevent flashover.