NGK Extra Long Life Double Platinum Spark Plug Box of 4 (PTRSF-11)

This is a box of four NGK Extra Long Life Double Platinum spark plugs, part number PTRSF-11. These plugs are designed to replace your vehicle's original equipment spark plugs, offering a direct fit for a wide range of cars and trucks. They are built with dual platinum surfaces, which means they wear down slowly, helping to maintain stable idling and improved fuel efficiency over their lifespan.

The pure alumina silicate ceramic insulator helps with heat transfer and provides strength, while the trivalent metal plating resists corrosion and makes them easier to remove later. The copper core inside helps dissipate heat, and corrugated ribs on the insulator prevent flashover. These features work together to ensure reliable starts and consistent performance, especially for vehicles originally equipped with fine wire platinum alloy plugs.