NGK 97939 DILKAR7S8 Laser Iridium Spark Plug

NGK single iridium 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

• Shell
• Thread Diameter12mm
• Thread Pitch1.25mm
• Seat TypeGasket
• Hex Size9/16" (14mm)
• Terminal TypeSolid
• Gap.031" (0.8mm)

• Center Electrode
• MaterialIridium
• TypeFine Wire
• Size0.6mm
• ProjectionExtended Projection

• Ground Electrode
• MaterialPlatinum
• TypeFine Wire
• Quantity1

• Specifications
• ResistorYes
• Heat Range7
• Torque SpecsCast Iron: 10.8-18 lb. ft. Aluminum: 10.8-14.5 lb. ft.

• Part Information
• BrandNGK/NTK
• Warranty60 Days
• Longevity100k Miles