NGK 7397 - TR5 Iridium IX Spark Plug

Sold as singles. Thread Size 14mm Thread Pitch 1.25mm Seat Type Tapered Reach 18mm (.709") Gap .028" (0.7mm) Heat Range 8 Center Electrode Material Nickel Center Electrode Projection Projected Ground Electrode Material Nickel NGK standard plugs are constructed for longer life and optimum performance. - 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