NGK 3690 - TR7IX IX Iridium Spark Plug

Sold as singles. Thread Size 14mm Thread Pitch 1.25mm Seat Type Tapered Reach 18mm (.709") Gap .039" (1.0mm) Heat Range 7 Center Electrode Material Iridium Center Electrode Projection Projected Ground Electrode Material Nickel NGK IX Iridium Series plugs were designed specifically for the performance enthusiast. - Fine wire center electrode ensures high durability and a consistently stable spark - Iridium alloy has an extremely high melting point, perfect for today's high-tech, high performance engines - Trivalent metal plating provides superior anti-corrosion and anti-seizing properties - Corrugated ribs prevent flashover - Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer - Copper core aids in heat removal - Triple seals prevent leakage