Denso (3289) PK16TR11 Double Platinum Spark Plug, Pack of 1

Denso Double Platinum Spark Plug Multi-ground electrodes and a platinum center electrode are another long life plug. The platinum tip on the center electrode will extend its life, while having more than one ground electrode also offers extended ground electrode life. 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. Technical Specifications - 14mm Thread, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Solid Terminal, Fine Wire Platinum Center Electrode, Side Discharge Dual Ground Electrodes, .044"Gap