NGK Laser Iridium Spark Plug Box of 4 (SILZNAR8C7H)

The center electrode on these NGK Laser Iridium spark plugs uses an iridium alloy, which has an extremely high melting point and is six times harder than platinum. This makes them a very durable option for your 2014-2017 Ford Fiesta. They are designed as an OE replacement, meaning they meet the original equipment specifications for your vehicle's ignition system.

NGK builds these plugs with a pure alumina silicate ceramic insulator that offers superior strength and helps with heat transfer, keeping the plug from overheating. The copper core also aids in removing heat. For easier installation and to prevent seizing, they feature trivalent metal plating. The fine wire design of the center electrode ensures a consistently stable spark, which is important for efficient combustion and reliable starts, especially in distributorless ignition systems where a raised platinum pad on the ground electrode helps manage wear.

These come in a box of four, which is what most 4-cylinder engines will need. NGK triple seals are used to prevent any leakage, ensuring the plug functions as intended.