The NGK LKAR6AHX Ruthenium HX spark plug is engineered for modern engines requiring high ignitability and long service life. Featuring a double fine electrode design, this plug enhances spark concentration and improves combustion efficiency across a wide range of air-fuel ratios.

NGK LKAR6AHX Ruthenium HX Spark Plug Features:

• 0.4 mm ruthenium fine wire center electrode
• 0.8 mm platinum fine wire ground electrode
• Double fine electrode design improves ignitability
• 12 mm thread diameter with 1.25 mm pitch
• 6.5 mm reach with gasket seat
• 9/16 in. hex size
• 0.043 in. preset gap
• Heat range 6
• 5k ohm resistor
• Solid terminal configuration
• Trivalent metal plating resists corrosion and seizure
• Copper core improves heat dissipation
• Corrugated ribs help prevent flashover
• Pure alumina silicate ceramic insulator enhances durability