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Extended battery life: Extends the battery’s life and cold cranking capacity
5-year warranty
Top Cap to keep dirt out
Width / Dim A: 813
meaning sweat is kept to a minimum
NGK Spark Plug IMR9D-9H (6544) – Single Aspect Ratio/Height_55 Percent Extended battery life: Extends theNGK single iridium plugs are designed specifically for performance enthusiasts. The fine wire centre electrode ensures high durability and a consistently stable spark. Iridium alloy has an extremely high melting point, making it perfect for todays high tech, high performance engines. Features: Trivalent metal plating provides superior anti corrosion and anti seizing properties. Corrugated ribs prevent flashover. Pure alumina silicate ceramic insulator